Sienna Miller – Age, Fiancé, Children and Career

Sienna Miller is a British actress and model who has remained a fixture of film and television coverage for more than two decades. Born on 28 December 1981 in New York City and raised in London, she came to prominence in the early 2000s through roles in Layer Cake and Alfie.

Her personal life has frequently shared the spotlight with her career. She was engaged to Jude Law in the 2000s, had a daughter with actor Tom Sturridge, and is currently reported to be engaged to producer Oli Green. Coverage in 2025 and 2026 has centred on her growing family and her candid comments about becoming a mother after 40.

Her story connects several distinct phases of British and American entertainment culture, from the tabloid era of the mid-2000s to the streaming age of the 2020s, and the public record of her life traces those shifts clearly.

Who Is Sienna Miller?

Sienna Rose Diana Miller was born on 28 December 1981 in New York City and raised in London, according to Wikipedia. She began her professional life as a model and moved into acting in the early 2000s.

Because her birthday falls at the end of December, her listed age varies between sources. Some databases have recorded her as 43, while more recently updated coverage describes her as 44.

Key points to know about Sienna Miller:

• She is an actress and model, not a professional singer.
• Her daughter Marlowe was born in July 2012.
• Vogue has reported that she and Oli Green are engaged.
• She has three children according to recent coverage.
• Notable film credits include Layer Cake, Alfie, Stardust, American Sniper and Foxcatcher.

Is Sienna Miller Married? Who Is Her Fiancé, Oli Green?

The clearest answer from available reporting is that Sienna Miller is not currently married. She was previously engaged to Jude Law during their relationship in the mid-2000s, but that engagement did not lead to marriage.

Vogue has reported that Miller and Oli Green are engaged. The couple have not publicly confirmed a wedding date, and no court or marriage records have appeared in published reporting.

Who is Oli Green?

Oli Green appears in coverage as Miller’s partner and the father of her two youngest children. He is identified as a producer in the entertainment industry rather than as a public figure in his own right. Green has largely stayed out of the celebrity press, which is why much of the public information about him comes through Miller’s interviews and Vogue’s reporting.

Who Is Sienna Miller’s Daughter and Does She Have Children?

Miller’s eldest child is Marlowe Sturridge, a daughter born in July 2012. Marlowe’s father is actor Tom Sturridge, who was in a relationship with Miller at the time. Famous Birthdays, along with Wikipedia and IMDb, identifies Tom Sturridge as Marlowe’s father.

Two children with Oli Green

Reports from People and other outlets indicate that she and Green have two children together: a daughter born in late 2023 or early 2024 and a son born in 2026. The names and exact birth dates of her two youngest children have not been widely confirmed.

Motherhood later in life

Miller has spoken candidly about becoming a mother again in her forties. She described the experience as unplanned and surprising, and said it was not something she had anticipated. Those comments were widely shared and became part of her recent public profile.

What Was Sienna Miller’s Relationship with Jude Law?

Miller and Jude Law met on the set of Alfie in 2004. Their relationship became one of the most closely followed celebrity stories of the mid-2000s, and her profile rose significantly during that period, according to Wikipedia and Rotten Tomatoes.

Miller and Law were engaged at one point but never married. After the relationship ended, both continued to appear in major film projects, and the media attention of that era remained a defining part of her public narrative.

Their work together on Alfie brought them into the same professional circles, and both saw their careers escalate during that period. Miller’s role in Factory Girl followed shortly afterward, while Law continued in high-profile Hollywood productions.

Miller has acknowledged in interviews that her life at the time was never going to be normal, a theme that runs through coverage of her early fame.

Film highlights

Rotten Tomatoes lists Miller’s notable film credits, including Layer Cake, Alfie, Casanova, Factory Girl, Stardust, G.I. Joe: The Rise of Cobra, Foxcatcher and American Sniper. More recent titles include Horizon: An American Saga – Chapter 1, while later projects such as Madden and Twiggy have also appeared in her credit list.

Television work

Miller has appeared in several television productions in recent years. She starred in The Loudest Voice as Beth Ailes, and later joined the Netflix series Anatomy of a Scandal. These roles demonstrated her ability to move between film and streaming television.

For many audiences, Miller’s early roles in Layer Cake and Alfie defined her career. Different phases of her career attract different audiences, and her filmography reflects that range.

Is Sienna Miller a Singer?

Sienna Miller is an actress and model. Available reports do not describe her as a singer, and no professional music career is recorded in her biographies.

Coverage from Good Housekeeping describes her as an actress and fashion figure. Cosmopolitan has covered her in the context of motherhood and acting, not music. Neither identifies her as a singer.

How Has Sienna Miller’s Life and Career Evolved Over Time?

• 28 December 1981 — Sienna Rose Diana Miller is born in New York City.
• Early 2000s — She begins modelling and appears in Italian Vogue, according to Wikipedia.
• 2004 — Miller appears in Layer Cake and Alfie, where she meets Jude Law.
• 2005–2006 — Her relationship with Jude Law dominates entertainment coverage.
• July 2012 — Her daughter Marlowe is born.
• 2025 — Vogue reports that she and Oli Green are engaged.
• 2026 — Reports place the birth of her son with Oli Green this year.

Separating established facts from unconfirmed reporting is important because much of Miller’s personal life has been covered through celebrity news rather than formal records. Her legal name, date of birth and acting credits are well documented, while the exact birth dates of her two youngest children are not widely published.

Miller’s visibility grew during a specific era of celebrity culture, when the press closely followed the personal lives of young British actors in Hollywood. Her relationship with Jude Law placed her at the centre of that coverage, but her film choices gave her staying power beyond tabloid headlines.

Her later career reinforced that position. Moving into television with The Loudest Voice and Anatomy of a Scandal brought her to new audiences, while her fashion presence kept her in lifestyle and culture magazines.

In conversation with The Observer, she reflected on growing up under media attention with the headline: “I was never going to have a normal life.” She has also spoken candidly about motherhood later in life.

For anyone following the careers of British actresses who balance independent and mainstream work, Helena Bonham-Carter – Biography, Career, and Personal Life offers another example of that path.

Sienna Miller is a British actress and model, born on 28 December 1981 in New York City and raised in London. She is not currently married, but Vogue has reported her engagement to Oli Green, with whom she has two children. She has one daughter, Marlowe, with actor Tom Sturridge. She remains best known for Layer Cake, American Sniper, The Loudest Voice and Anatomy of a Scandal, and she is not a professional singer. For another British performer with a similarly broad career, see Tom Hollander – Height, Age, Career and Iconic Roles.

What Do People Commonly Ask About Sienna Miller?