Sienna Miller Biography 2026: Age, Partner, Net Worth, Movies & Career

Sienna Miller is an acclaimed British-American actress and style icon celebrated for her compelling performances across film, television, and the stage. From her breakthrough turns in classic 2000s cinema like Layer Cake and Alfie to award-nominated dramatic roles in The Girl, Foxcatcher, American Sniper, and Kevin Costner’s epic western saga Horizon, she has established herself as one of Hollywood’s most versatile and enduring screen presences. Residing between London and New York, she continues to capture audience attention worldwide with high-profile dramatic projects and dynamic public appearances.

Quick Facts

Fans and industry peers frequently associate Sienna Miller with other leading British and Hollywood contemporaries such as Keira Knightley, Carey Mulligan, Emily Blunt, and Rosamund Pike.

Early Life & Education

Sienna Rose Diana Miller was born in New York City on December 28, 1981. Her father, Edwin Miller, is an American-born former art dealer and investment banker, while her mother, Josephine Miller, is a South African-born British former model who managed the prestigious Lee Strasberg Theatre and Film Institute in London. When Sienna was just eighteen months old, the family moved from Manhattan to London.

Her parents divorced when she was six years old, after which she spent her childhood in Wiltshire and London alongside her older sister, Savannah. Sienna attended Heathfield School, an independent boarding school in Ascot, Berkshire, where she nurtured a passionate interest in sports, dramatic arts, and literature. Following the completion of her secondary education at age eighteen, she moved back to New York City to formally study acting for a year at the Lee Strasberg Theatre and Film Institute.

Career Journey: Breakthroughs, Blockbusters, and 2026 Screen Roles

Early Career and Breakthrough (2001–2006)

Miller began her professional career working as a photographic model, posing for major publications including Italian Vogue and the famous Pirelli calendar. Her on-screen acting debut arrived in 2001 with minor appearances on television and in the independent film South Kensington.

Her major breakout came in 2004 when she starred back-to-back in two high-profile British productions: Matthew Vaughn’s stylish crime thriller Layer Cake opposite Daniel Craig, and the romantic comedy-drama remake of Alfie alongside Jude Law. Her magnetic presence and natural charisma quickly made her an international household name. In 2005, she starred as the fiercely independent Francesca Bruni in Lasse Hallström’s period romance Casanova opposite Heath Ledger, followed by her portrayal of Andy Warhol muse Edie Sedgwick in the biographical drama Factory Girl (2006), earning praise for her raw dramatic range.

Transition to Major Studio Films and Stage Acclaim (2007–2013)

Miller expanded her creative range through fantasy and studio action, appearing in Matthew Vaughn’s acclaimed fairy tale adventure Stardust (2007) and portraying the villainous Baroness (Ana Lewis) in the summer blockbuster G.I. Joe: The Rise of Cobra (2009).

Alongside Hollywood productions, she dedicated significant time to theatrical work on both London’s West End and Broadway. In 2009, she made her Broadway debut in Patrick Marber’s After Miss Julie at the American Airlines Theatre. In 2011, she starred in Terence Rattigan’s Flare Path at London’s Theatre Royal Haymarket, receiving widespread critical acclaim. Her performance as Tippi Hedren in the 2012 HBO/BBC television film The Girl earned her nominations for a BAFTA TV Award and a Golden Globe Award for Best Actress in a Miniseries or Motion Picture Made for Television.

Prestige Drama Success (2014–2022)

During the mid-2010s, Miller became a go-to actress for top-tier directors helm-ing prestige true-crime and biographical dramas. In 2014, she starred alongside Steve Carell, Channing Tatum, and Mark Ruffalo in Bennett Miller’s Academy Award-nominated drama Foxcatcher, followed immediately by her performance as Taya Kyle in Clint Eastwood’s massive box-office hit American Sniper.

Other major credits during this period include working with Bradley Cooper again in Burnt (2015), James Gray’s adventurous historical epic The Lost City of Z (2016), Ben Affleck’s gangster drama Live by Night (2016), and the gritty drama American Woman (2018), which generated some of the strongest critical reviews of her career. In 2019, she transformed to play Beth Ailes in the Showtime miniseries The Loudest Voice, and in 2022, she led Netflix’s hit psychological courtroom drama Anatomy of a Scandal as Sophie Whitehouse.

Recent Highlights and 2026 Horizon Saga

Entering the mid-2020s, Miller took on substantial roles across streaming and the big screen, including Scott Z. Burns’ climate-focused anthology series Extrapolations on Apple TV+. She was cast as Frances Kittredge in Kevin Costner’s ambitious multi-part western epic Horizon: An American Saga. Moving through 2026, Miller remains active in international cinema, balancing character-driven indie features, theatrical productions, and global fashion collaborations.

Career Highlights & Selected Filmography

• Layer Cake (2004) – Tammy
• Alfie (2004) – Nikki
• Casanova (2005) – Francesca Bruni
• Factory Girl (2006) – Edie Sedgwick
• Stardust (2007) – Victoria Forester
• The Edge of Love (2008) – Caitlin Macnamara
• G.I. Joe: The Rise of Cobra (2009) – The Baroness / Ana Lewis
• The Girl (2012, TV Movie) – Tippi Hedren
• Foxcatcher (2014) – Nancy Schultz
• American Sniper (2014) – Taya Kyle
• High-Rise (2015) – Charlotte Melville
• The Lost City of Z (2016) – Nina Fawcett
• Live by Night (2016) – Emma Gould
• American Woman (2018) – Deb Callahan
• 21 Bridges (2019) – Frankie Burns
• The Loudest Voice (2019, TV Miniseries) – Beth Tilson Ailes
• Anatomy of a Scandal (2022, Miniseries) – Sophie Whitehouse
• Extrapolations (2023, TV Series) – Rebecca Shearer
• Horizon: An American Saga (2024–2026) – Frances Kittredge

Personal Life

Relationships and Family

Miller’s personal life has frequently attracted intense media focus throughout her career. In late 2003, she met actor Jude Law during the filming of Alfie. The couple became engaged on Christmas Day in 2004, but their relationship faced intense tabloid scrutiny and public ups and downs before concluding in late 2006. They briefly reconciled between 2009 and 2011 before amicably parting ways.

From 2011 to 2015, Miller was in a relationship with British actor Tom Sturridge. In July 2012, the pair welcomed their daughter, Marlowe Ottoline Layng Sturridge. Even after their separation, Miller and Sturridge have maintained an exemplary, supportive co-parenting partnership.

In early 2022, Miller began dating actor and model Oli Green. In late 2023, the couple welcomed a daughter together. Living actively in 2026 as a proud mother of two, Miller has spoken warmly about the profound joy, balance, and grounding perspective motherhood brings to her career.

Fashion & Philanthropy

Alongside her sister Savannah, a professional fashion designer, Miller co-founded the popular fashion label Twenty8Twelve in 2007, serving as co-creative director until early 2012. She is widely credited by fashion historians as the leading pioneer of the mid-2000s “boho-chic” aesthetic. She is also an active global ambassador for International Medical Corps and has supported numerous charitable initiatives dedicated to children’s welfare and refugee relief.

Awards & Nominations

• BAFTA Television Awards (2013): Nominated – Best Leading Actress (The Girl)
• Golden Globe Awards (2013): Nominated – Best Actress in a Miniseries or Motion Picture Made for Television (The Girl)
• BAFTA Film Awards (2008): Nominated – EE Rising Star Award
• British Independent Film Awards (2008): Nominated – Best Supporting Actress (The Edge of Love)
• Critics’ Choice Television Awards (2013): Nominated – Best Movie/Miniseries Supporting Actress (The Girl)
• Golden Raspberry Awards (2010): Won – Worst Supporting Actress (G.I. Joe: The Rise of Cobra)
• ShoWest Convention Award (2009): Won – Supporting Actress of the Year

Physical Statistics

Quotes

“I think the older you get, the more comfortable you are in your own skin. You stop caring about the superficial things and focus on what genuinely matters: your craft, your family, and your peace.”

“I love creating complicated characters who don’t fit into neat little boxes. Real human beings are messy, contradictory, and vulnerable, and that is what I want to portray on screen.”

Controversies & Media Privacy Battle

During the height of 2000s paparazzi culture, Miller was among the most heavily targeted celebrities in the United Kingdom. In 2008, she took legal action against photographers and a prominent photo agency for privacy harassment, securing a major high-court victory that helped redefine privacy boundaries for public figures.

Later, Miller became a pivotal figure in uncovering the British phone-hacking scandal. In 2011, she testified at the Leveson Inquiry regarding unlawful media intrusion into her personal voicemail messages and private communications. Her brave and persistent legal stand earned widespread praise across legal and civil liberties organizations.

Favorites

• Favorite Designers: Chloé, Isabel Marant, Gucci
• Favorite Movies: The Apartment (1960), Annie Hall (1977)
• Favorite Destination: Formentera (Spain), Cotswolds (England)
• Favorite Beverage: Earl Grey Tea & Fresh Sparkling Water
• Favorite Book: The Great Gatsby by F. Scott Fitzgerald

Sienna Miller Net Worth and Salary in 2026

As of 2026, Sienna Miller’s estimated net worth stands between $18 million and $20 million. Her earnings derive from over two decades of leading film salaries, television contracts, high-profile modeling endorsements, and theater productions.

At the height of her studio film career and recent major television productions like Anatomy of a Scandal and Horizon, she commanded between $1.5 million and $3 million per feature film project. Additionally, her historic brand ambassadorships with luxury houses such as Burberry, Gucci, and Marks & Spencer have contributed substantially to her lasting financial independence.

Interesting Facts

• She was born in New York City, holds dual citizenship in the US and the UK, and can effortlessly switch between natural British and American accents for roles.
• Miller beat out hundreds of actresses for her critically lauded turn as Edie Sedgwick in Factory Girl after intense screen tests.
• She made her Broadway singing debut playing Sally Bowles in the 2015 revival of Cabaret at Studio 54.
• Her mother Josephine once studied under renowned acting guru Lee Strasberg and later ran his London school.

Did You Know Already?

• Miller was instrumental in changing paparazzi laws in the UK after winning landmark legal injunctions protecting personal privacy.
• She and her sister Savannah named their former clothing line Twenty8Twelve after Sienna’s birthday (December 28).
• She learned to operate heavy firearms and completed tactical training for her role in G.I. Joe: The Rise of Cobra.

Social Media & Web Presence

While Miller maintains a selective and private stance toward public social media, information about her official film projects and public appearances is featured through major studio, agency, and production outlets:

• Instagram: Official verified updates frequently appear via Instagram project channels and brand partners.
• IMDb Profile: Sienna Miller on IMDb

Frequently Asked Questions

Summary

Sienna Miller remains one of contemporary cinema’s most fascinating and enduring figures. Balancing family life, acclaimed independent storytelling, and major studio projects, her artistic legacy continues to thrive across the international stage. If you enjoyed reading this profile, feel free to share it with fellow film and fashion enthusiasts!

Sources: Major news outlets, public entertainment archives, verified film festival publications, and industry profiles.