Sienna Miller is a celebrated American-British actress whose career has blended glamour, versatility, and resilience. Born in New York and raised in London, she first stepped into the spotlight as a fashion model before quickly rising to fame on screen with standout roles in Layer Cake and Alfie in 2004.
Over the years, she has become known for her powerful performances in both film and television, portraying complex real-life figures and earning major award nominations along the way.
From her early tabloid challenges to her acclaimed return in projects like The Girl, Foxcatcher, and Anatomy of a Scandal, Sienna’s journey reflects both artistic depth and personal strength. This article will explore her early life, family, personal relationships, career highlights, and more.
Sienna Miller Is Pregnant Again — Expecting Third Child with Partner Oli Green
Sienna Miller announced on 1 December 2025 that she is expecting her third child, and her second with partner Oli Green. The news was welcomed by fans and media alike, many celebrating the actress’s growing family.
Miller and Green have been dating since late 2021, and they already share a daughter born in December 2023. The couple was seen together recently at the Fashion Awards 2025, where Miller appeared sporting a chic baby bump under a stylish coat.
Early Life & Education, Parents
Sienna Miller was born in New York City, famously arriving while her mother was attending a performance of The Nutcracker Suite. When she was just 18 months old, her family moved to London, where she spent most of her childhood.
She attended Heathfield School in Ascot, a private boarding school in Berkshire. Sienna comes from a creative and internationally rooted family. Her father, Edwin Miller, was a banker who later became a dealer in Chinese art, while her mother, Jo Miller, is a former model born in South Africa to British parents and once worked closely with stars like David Bowie. Sienna grew up alongside her siblings, Savannah, Natasha, Charles, and Stephen, in a home that balanced artistic influence with global experiences.
| Full Name | Sienna Rose Diana Miller |
| Date of Birth | 28 December 1981 |
| Place of Birth | New York, New York, United States |
| Nationality | American, British |
| Parents | Father: Edwin Miller
Mother: Jo Miller |
| Boyfriend | Oli Green |
| Children | 2 |
| Siblings | Savannah Miller, Natasha Miller, Charles Miller, Stephen Miller |
| Citizenship | United States; United Kingdom |
| Net Worth | $18 million |
| Social Media | Instagram – XTwitter – YouTube |
Net Worth, Religion & Ethnicity
As of 2025, Sienna Miller has an estimated net worth of around $18 million, earned through her long career in film, television, modelling, and brand endorsements. She comes from a culturally diverse background: her father is American, and her mother is British with South African roots, giving her a mixed American-British heritage.
In terms of religion, Sienna has not publicly identified with any specific faith, and she is generally considered non-religious or private about her beliefs. Her identity is shaped more by her international upbringing and creative family background than by formal religious practice.
Personal life, Boyfriend & Relationships
Sienna Miller’s personal life has often been in the spotlight, with several high-profile relationships over the years. She first became engaged to Alfie co-star Jude Law in 2004, but the relationship ended in 2006 after his widely publicised affair. They briefly reunited in 2009 before parting ways again in 2011.
Sienna later shared a long-term relationship with actor Tom Sturridge, and together they welcomed a daughter in 2012. After their separation in 2015, the two remained close co-parents. In late 2021, Sienna began dating actor Oli Green, marking a new, steady chapter in her life.
They welcomed a daughter in December 2023 and continued to appear publicly as a couple, including at the Oasis concert at Wembley in July 2025. On December 1, 2025, Sienna announced she is expecting her third child, happily expanding her family once again with Green.
Height, Weight & Physical Appearance
Sienna Miller has a naturally elegant and classic look. She stands around 5 feet 5 inches tall (165 cm) and maintains a slim build, weighing roughly 54 kg (119 lbs). Her blonde hair has long been part of her signature style, though she occasionally experiments with different shades. She has striking blue eyes.
Career Details
Sienna Miller began her screen journey with her debut in South Kensington (2001) before gaining wider attention through early TV roles like Keen Eddie. Her breakthrough arrived in 2004 with Layer Cake and Alfie, which put her firmly in the spotlight and brought intense media attention.
Over the years, she built a versatile career playing Edie Sedgwick in Factory Girl, starring in Stardust, and taking on dramatic roles in projects like The Girl, Foxcatcher, American Sniper, The Lost City of Z, and American Woman.
She also worked on Broadway in After Miss Julie, Cabaret, and Cat on a H*t Tin Roof. Beyond acting, Sienna has modelled for major brands, fronted global fashion campaigns, and co-founded the clothing label Twenty8Twelve with her sister. Her career is marked by resilience, range, and a steady shift from tabloid focus to respected, critically acclaimed performances.
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