Sienna Miller is a British-American actress, former model, and fashion icon best known for her performances in Layer Cake, Alfie, American Sniper, and Anatomy of a Scandal. Born on December 28, 1981, she became one of the most recognisable faces of British entertainment during the 2000s before establishing herself as a versatile performer in international cinema and television.
Beyond acting, Miller has attracted attention for her distinctive fashion sense, high-profile relationships, and family life. In 2026, she returned to television screens in the legal drama War, while her engagement to actor Oli Green and the arrival of her third child marked significant developments in her personal life.
Her journey from a young London-based model to an established Hollywood actress offers an interesting look at celebrity culture, artistic reinvention, and the challenges of balancing public attention with private life.
Who Is Sienna Miller?
Sienna Miller is an actress who holds both British and American citizenship. Although she was born in New York City, she grew up in London and is widely associated with the British film and fashion industries.
She first gained widespread recognition through her appearances in Layer Cake and Alfie in 2004. These performances introduced her to international audiences and helped establish her reputation as a rising Hollywood star.
Over time, her career expanded beyond romantic dramas and stylish supporting roles. She took on more challenging characters in independent productions, historical films, television dramas, and major Hollywood releases.
Her performances have received recognition from organisations including the Golden Globes and BAFTA, demonstrating that her professional achievements extend well beyond her early celebrity image.
Sienna Miller Biography and Personal Details
| Detail | Information |
|---|---|
| Full name | Sienna Rose Diana Miller |
| Date of birth | December 28, 1981 |
| Age in November 2026 | 44 years |
| Birthplace | New York City, United States |
| Nationality | British-American |
| Profession | Actress, former model, fashion designer |
| Height | Approximately 5 feet 5 inches (165 cm) |
| Famous films | Layer Cake, Alfie, Factory Girl, American Sniper |
| Notable television series | Anatomy of a Scandal, War |
| Current partner | Oli Green |
| Relationship status | Engaged |
| Children | Three |
| Known for | Acting, bohemian fashion, and television performances |
These details provide a quick introduction to an actress whose career spans more than two decades.
Sienna Miller’s Early Life and Family Background
Sienna Miller was born in New York City to American father Edwin Miller and South African-born mother Josephine Miller. Her family relocated to London during her early childhood, and she spent much of her formative years in England.
Her mother worked as a model and later pursued other professional interests, while her father was involved in banking and art dealing. Growing up around creative influences helped expose Miller to fashion and the arts from an early age.
She attended Heathfield School in Ascot, Berkshire, where she developed an interest in performance and artistic expression.
After completing her early education, Miller returned to New York to study acting at the Lee Strasberg Theatre and Film Institute.
Her Relationship With Sister Savannah Miller
Sienna’s older sister, Savannah Miller, also developed a successful creative career, particularly in fashion design.
The sisters later collaborated on the clothing label Twenty8Twelve, which reflected their shared interest in contemporary fashion.
Their professional relationship became an important part of Sienna’s activities outside film and television.
How Sienna Miller Started Her Acting Career
Before becoming a familiar Hollywood name, Miller worked as a model and appeared in various fashion campaigns.
Her early modelling experience helped her gain confidence in front of cameras, although acting eventually became her main professional focus.
She began appearing in film and television projects during the early 2000s, gradually building experience and industry connections.
Her breakthrough arrived in 2004, when she appeared in two films that significantly increased her visibility.
Sienna Miller in Layer Cake
Layer Cake is a British crime thriller released in 2004 and directed by Matthew Vaughn.
The film stars Daniel Craig as a successful cocaine dealer attempting to leave the criminal underworld. Miller plays Tammy, a character who becomes part of the protagonist’s complicated personal life.
Although her role was relatively small, her appearance helped introduce her to a much wider audience.
The film also became notable for its stylish direction, complicated criminal relationships, and strong ensemble cast.
For viewers interested in Sienna Miller Layer Cake, the film remains an important starting point for exploring her early acting career.
Her Breakthrough With Alfie
Also released in 2004, Alfie featured Miller alongside Jude Law in a romantic comedy-drama about a charming but emotionally irresponsible man.
Miller portrayed Nikki, one of the women who becomes involved in Alfie’s personal relationships.
The film brought her greater international exposure and contributed to her emergence as a prominent actress in British and American entertainment.
Her appearance in Alfie also coincided with growing public interest in her relationship with Jude Law.
Sienna Miller Movies and TV Shows Worth Watching
Sienna Miller has appeared in crime thrillers, romantic dramas, historical films, biographical productions, and television series.
Her filmography demonstrates a willingness to move between commercial projects and smaller, character-driven stories.
| Movie or TV Show | Year | Role |
|---|---|---|
| Layer Cake | 2004 | Tammy |
| Alfie | 2004 | Nikki |
| Casanova | 2005 | Francesca Bruni |
| Factory Girl | 2006 | Edie Sedgwick |
| The Edge of Love | 2008 | Caitlin Macnamara |
| G.I. Joe: The Rise of Cobra | 2009 | The Baroness |
| The Girl | 2012 | Tippi Hedren |
| Foxcatcher | 2014 | Nancy Schultz |
| American Sniper | 2014 | Taya Kyle |
| Burnt | 2015 | Helene |
| The Lost City of Z | 2016 | Nina Fawcett |
| American Woman | 2018 | Debra Callahan |
| 21 Bridges | 2019 | Frankie Burns |
| Anatomy of a Scandal | 2022 | Sophie Whitehouse |
| Extrapolations | 2023 | Rebecca Shearer |
| War | 2026 | Carla Duval |
Factory Girl and Her Portrayal of Edie Sedgwick
In Factory Girl, Miller portrayed Edie Sedgwick, an American socialite and artist associated with Andy Warhol’s creative circle.
The role required her to depict a complicated personality navigating fame, artistic ambition, and personal difficulties.
The film became one of her most recognisable early dramatic performances and demonstrated her interest in portraying real historical figures.
American Sniper
In Clint Eastwood’s American Sniper, Miller played Taya Kyle, the wife of Navy SEAL Chris Kyle, portrayed by Bradley Cooper.
The film explores the emotional consequences of military service, including the pressure placed on families.
Miller’s performance provided an important personal perspective within a story largely focused on combat and its psychological effects.
American Woman
American Woman gave Miller a particularly substantial leading role.
She played Debra Callahan, a Pennsylvania woman whose life changes dramatically after her teenage daughter disappears.
The character’s experiences unfold over several years, allowing Miller to portray grief, family responsibility, and personal growth.
For audiences interested in her dramatic acting abilities, this film is among her most rewarding performances.
Sienna Miller in War: Her Major Television Role in 2026
One of Sienna Miller’s most prominent television projects in 2026 is War, a legal drama produced for Sky and HBO.
Created by George Kay, the series explores the professional and personal conflicts surrounding powerful London law firms.
Miller plays Carla Duval, an internationally famous actress involved in a highly publicised divorce from technology entrepreneur Morgan Henderson, played by Dominic West.
The dispute becomes the centre of an intense legal battle between rival firms determined to protect their clients’ interests.
What Is the TV Series War About?
War follows two prestigious London law firms, Cathcarts & Sons and Taylor & Byrne, as they compete in complicated, high-stakes legal disputes.
The first season focuses on a celebrity divorce involving enormous financial, professional, and reputational consequences.
The eight-part drama premiered on October 1, 2026, in the United States and October 2, 2026, in the United Kingdom.
The series features an ensemble cast including Phoebe Fox, James McArdle, Nina Sosanya, Pip Torrens, and Archie Renaux.
For anyone searching Sienna Miller War or War Sienna Miller, the actress plays Carla Duval rather than one of the lawyers representing the divorcing couple.
Where Can You Watch War?
In the United Kingdom, War is available through Sky and its streaming service NOW.
American viewers can access the series through HBO and HBO Max, subject to their current subscriptions and regional availability.
The programme adds another high-profile television drama to Miller’s established screen career.
Sienna Miller’s Television Career Beyond War
Although movies introduced Miller to international audiences, television has provided some of her most critically recognised opportunities.
In the 2012 television film The Girl, she portrayed actress Tippi Hedren during the period surrounding her work with filmmaker Alfred Hitchcock.
Her performance earned nominations for both a Golden Globe and a BAFTA Television Award.
Years later, she played Sophie Whitehouse in Netflix’s Anatomy of a Scandal, a psychological and courtroom drama examining political privilege, marriage, and allegations of sexual misconduct.
She also appeared in the 2023 anthology series Extrapolations, which explores imagined futures shaped by climate change.
Together, these productions illustrate her ability to portray characters dealing with difficult personal decisions and complicated social environments.
How Old Is Sienna Miller in 2026?
Sienna Miller is 44 years old as of November 2026.
She was born on December 28, 1981, which means she will celebrate her 45th birthday on December 28, 2026.
Her career began gaining international momentum while she was in her early twenties.
More than two decades later, she continues to work in major film and television productions.
Her longevity reflects both her established industry reputation and her willingness to take on different kinds of roles.
Sienna Miller Husband: Is the Actress Married?
Sienna Miller is engaged to actor and model Oli Green, but publicly available reporting as of November 2026 does not establish that they have married.
Their engagement was confirmed in June 2026 after several years together.
Questions about a Sienna Miller husband or Sienna Miller ex husband often arise because of her previous high-profile relationships.
However, there is an important distinction between being engaged, dating someone, and being legally married.
Miller’s relationships with Jude Law and Tom Sturridge did not result in marriage.
Who Is Sienna Miller’s Fiancé Oli Green?
Oli Green is a British actor and model who has been romantically involved with Miller since the early 2020s.
The couple began attracting public attention in 2022 and subsequently built a family together.
They welcomed their first child together in late 2023 and their second in 2026.
Their engagement was publicly confirmed in June 2026, marking a new stage in their relationship.
While fans continue to search for updates about Sienna Miller’s boyfriend, fiancé is the more accurate description of Green’s relationship with her as of November 2026.
Sienna Miller and Jude Law: Their Famous Relationship
Sienna Miller and Jude Law were among Britain’s most heavily discussed celebrity couples during the 2000s.
They met while working on Alfie and became engaged in 2004.
Their relationship attracted considerable press attention, particularly after Law publicly acknowledged an affair in 2005.
The couple separated, later reconciled, and eventually ended their relationship again in 2011.
Their history remains a frequent subject of entertainment searches because both actors were prominent figures in British cinema at the time.
Despite their highly publicised engagement, Miller and Law never married.
Sienna Miller’s Relationship With Tom Sturridge
After her relationship with Jude Law, Miller began dating British actor Tom Sturridge.
The couple welcomed their daughter Marlowe in 2012.
Although Miller and Sturridge ended their romantic relationship in 2015, they continued to share parenting responsibilities.
Miller has discussed their cooperative relationship in interviews, describing the importance of maintaining a supportive family environment.
Their approach to co-parenting has remained part of the public conversation surrounding her personal life.
Sienna Miller Children: How Many Kids Does She Have?
Sienna Miller is the mother of three children as of November 2026.
Her eldest daughter, Marlowe Sturridge, was born in 2012 during her relationship with Tom Sturridge.
Miller later welcomed a daughter with Oli Green in December 2023.
In May 2026, she publicly confirmed the arrival of another baby with Green, bringing her total number of children to three.
Sienna Miller’s Daughter Marlowe
Marlowe is Miller’s eldest child and has occasionally appeared in public discussions about the actress’s family life.
Miller has spoken about motherhood changing her priorities and the ways she approaches work.
Despite public interest in her daughter, the family maintains boundaries around personal matters.
Sienna Miller’s Pregnancy and Third Baby
Searches for Sienna Miller pregnant became particularly popular after she revealed her pregnancy at the British Fashion Awards in December 2025.
She appeared at the event wearing a white Givenchy gown that displayed her baby bump.
In May 2026, Miller confirmed that she had welcomed her third child.
An August 2026 interview with British Vogue also discussed her postpartum experience and the realities of parenting three children.
Consequently, older reports describing her as pregnant may no longer reflect her current circumstances.
Balancing Motherhood and Acting
Miller’s experiences as a parent have coincided with continued professional activity.
She has spoken openly about fatigue, shifting priorities, and adapting to life with young children.
Her recent career demonstrates that becoming a parent does not necessarily mean stepping away from demanding creative roles.
At the same time, she has increasingly emphasised the importance of privacy for her children.
Sienna Miller Hair and Her Influence on Fashion
Sienna Miller became one of the defining fashion figures of the early 2000s, especially through her association with bohemian style.
Her wardrobe frequently included flowing dresses, vintage-inspired pieces, relaxed tailoring, boots, and layered accessories.
Rather than relying exclusively on formal designer outfits, she helped popularise a more casual, individual approach to celebrity fashion.
Her influence remains visible in contemporary collections, festival looks, and street-style trends.
Why Sienna Miller’s Hairstyles Are Popular
Sienna Miller’s hair has attracted attention for its natural-looking texture and relaxed appearance.
Her signature styles often feature blonde tones, loose waves, soft layers, and movement around the face.
In a 2026 interview with British Vogue, Miller discussed her preference for relatively simple hair routines and working with her natural texture.
Her beauty style often relies on an appearance that feels polished without being excessively structured.
Readers interested in recreating a similar look can consider soft face-framing layers, a textured long bob, or loose waves suited to their natural hair type.
Her Twenty8Twelve Fashion Label
Miller and her sister Savannah founded the fashion label Twenty8Twelve in 2007.
The brand combined contemporary design with influences from British street fashion and the sisters’ personal style.
They later stepped away from their creative-director roles in 2012.
Although acting remains Sienna’s primary profession, the label demonstrated her involvement in fashion beyond endorsements and public appearances.
Sienna Miller’s Awards and Career Recognition
Miller’s career has received recognition from several notable entertainment organisations.
Her portrayal of Tippi Hedren in The Girl earned a Golden Globe nomination in 2013.
The same performance also brought a BAFTA Television Award nomination for Leading Actress.
She received a BAFTA Rising Star Award nomination earlier in her career, reflecting her growing reputation within the British film industry.
Her work in American Woman, Factory Girl, and other character-driven films has also contributed to her standing as a serious dramatic performer.
Although she became famous partly through celebrity coverage, her lasting career has depended on the strength and variety of her screen performances.
Sienna Miller Net Worth and Career Earnings
Sienna Miller’s exact net worth has not been publicly verified through comprehensive financial disclosures.
Various entertainment websites publish estimated figures, but these should not be treated as confirmed information.
Her professional income has likely come from several areas, including:
- Acting in feature films and television productions.
- Modelling and fashion campaigns.
- Brand partnerships and endorsements.
- Fashion-design ventures.
- Other commercial and creative projects.
Film salaries are usually negotiated privately, and publicly reported figures do not necessarily account for taxes, investments, expenses, or contractual arrangements.
For these reasons, presenting a precise net worth without reliable supporting documentation would be misleading.
Where Does Sienna Miller Live?
Sienna Miller has maintained strong ties to London and has spent significant periods living and working in the United Kingdom and United States.
Her upbringing in England, acting career, and family relationships have all influenced her connection to both countries.
She has spoken publicly about different homes and locations over the years, but historical property reports should not automatically be interpreted as evidence of her current primary residence.
For privacy and accuracy, it is better to describe her broader connections to London and international entertainment centres rather than speculate about her present home address.
Why Sienna Miller Remains Relevant in Hollywood
Sienna Miller’s career is notable because she has successfully navigated several different stages of public recognition.
She initially became famous during a period when celebrity relationships and fashion coverage often overshadowed discussions of acting ability.
Over time, performances in The Girl, American Sniper, American Woman, and Anatomy of a Scandal helped establish a more substantial professional reputation.
Her appearance in War during 2026 shows that she continues to attract prominent television opportunities.
Her enduring influence also extends into fashion, where her early bohemian aesthetic remains a familiar reference point.
The combination of acting experience, international recognition, and personal style helps explain why interest in Miller continues more than twenty years after her breakthrough.
Frequently Asked Questions About Sienna Miller
Who Is Sienna Miller?
Sienna Miller is a British-American actress and former model known for movies including Layer Cake, Alfie, and American Sniper. She also starred in the television dramas Anatomy of a Scandal and War.
How Old Is Sienna Miller?
She is 44 years old as of November 2026. Her birthday is December 28, 1981.
Is Sienna Miller Married?
As of November 2026, Miller is engaged to actor Oli Green. There is no confirmed public announcement that the couple has married.
Who Was Sienna Miller Married To?
Miller has not publicly been confirmed as previously married. She was engaged to Jude Law and later had a long-term relationship with Tom Sturridge.
Who Is Sienna Miller’s Boyfriend?
Her current partner is British actor and model Oli Green. Their engagement was confirmed in June 2026.
How Many Children Does Sienna Miller Have?
Miller has three children. Her eldest daughter, Marlowe, was born in 2012, and she has two younger children with Oli Green.
Who Is Sienna Miller’s Daughter?
Her eldest daughter is Marlowe Sturridge, whose father is actor Tom Sturridge. Miller also has a younger daughter with Oli Green.
Is Sienna Miller Pregnant in 2026?
Miller announced a pregnancy in December 2025 and confirmed the arrival of her third child in May 2026. There is no verified public announcement of another pregnancy as of November 2026.
What Is Sienna Miller’s Role in War?
She portrays Carla Duval, a famous actress whose divorce from technology entrepreneur Morgan Henderson becomes the focus of an intense legal dispute.
What Are Sienna Miller’s Best Movies?
Some notable titles include Layer Cake, Alfie, Factory Girl, American Sniper, The Lost City of Z, and American Woman. The best choice depends on whether viewers prefer thrillers, historical dramas, or character-focused stories.
Where Was Sienna Miller Born?
She was born in New York City, United States, and grew up primarily in London, England.
Is Sienna Miller British?
Yes. Miller has British and American citizenship and is strongly associated with British cinema and fashion.
What Is Sienna Miller’s Natural Hair Colour?
Her hair is often seen in blonde shades, although her appearance has changed throughout her career. Fashion reporting has also described her natural roots as darker than many of her signature blonde looks.
Has Sienna Miller Appeared in Nude Scenes?
Miller has appeared in adult-oriented film productions involving intimate or revealing scenes. These performances should be considered within the context of the films and their official age classifications rather than confused with private or unauthorised imagery.
What Is Sienna Miller Doing in 2026?
In 2026, Miller appeared in the Sky and HBO legal drama War. She also welcomed her third child and announced her engagement to Oli Green.
Sienna Miller’s Lasting Impact on Entertainment and Fashion
Sienna Miller has built a career that reaches far beyond the celebrity attention surrounding her early years in Hollywood.
From her breakthrough in Layer Cake and Alfie to her dramatic performances in American Woman and Anatomy of a Scandal, she has shown an ability to adapt to different roles, genres, and creative challenges.
Her influence on bohemian fashion remains an important part of her public identity, while her recent acting work demonstrates continued professional relevance.
With three children, a confirmed engagement, and prominent television roles, Miller’s life in 2026 reflects both personal change and an established career.
For viewers discovering her work for the first time, Layer Cake, American Woman, and War offer three different perspectives on her development as an actress.
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