Sienna Rose Miller (born December 28, 1981) is an English actress, model, and fashion designer, best known for her roles in Layer Cake, Alfie, Factory Girl, The Edge of Love and G.I. Joe: The Rise of Cobra.
Born in New York City, Miller moved to London with her family when she was just over a year old. Her father, Edwin Miller, is an American banker turned dealer of Chinese art.Miller has a sister, Savannah, two half-brothers, Charles and Stephen, and a stepsister, Natasha Corrett (the daughter of her father's second wife, Kelly Hoppen).
Miller attended Heathfield St Mary's School, a boarding school in Ascot, Berkshire, and later studied for a year at the Lee Strasberg Institute in New York City.She carries both British and American passports, and acquired her first driving licence in the U.S. Virgin Islands, since it was easy to qualify, which allowed her to drive in both the U.S. and UK
Prior to her professional acting career, Miller worked as a photographic model. She signed with Tandy Anderson of Select Model Management London, and modeled for Coca-Cola, Italian Vogue, and posed topless in the 2003 Pirelli Calendar. Miller has also been closely associated with the style of fashion that became known as boho chic, much of which fashion followers noted was strikingly similar to the style of model Kate Moss.
Miller signed a two-year contract with Pepe Jeans London; the jeans ad campaign first appeared in magazines March 2006. In February 2009, Hugo Boss Fragrances announced that Miller would be the new ambassador for their women's BOSS Orange women's perfume.
In 2001, she made her film début with South Kensington, with Rupert Everett and Elle Macpherson and later had a recurring role in the television drama series Keen Eddie. In 2004 Miller had a supporting roles in the remake Alfie with Jude Law and in Layer Cake. In 2005, Miller played the female lead opposite Heath Ledger in the period comedy drama, Casanova, followed by the role of 1960s socialite and Andy Warhol's muse Edie Sedgwick in Factory Girl, which opened December 29, 2006. In 2007, Miller had a small role in Matthew Vaughn's adaption Stardust and played a starlet to Steve Buscemi's reporter in Interview, another remake. Later in 2007, she portrayed an undead bride opposite James Franco in Camille.
In 2008, Miller appeared in the film version of writer Michael Chabon's novel, The Mysteries of Pittsburgh and filmed The Edge of Love, with friend Keira Knightley, a biopic of Dylan Thomas in which she plays his wife Caitlin. She appeared in the 2009 live-action film adaptation of the comic book and cartoon G.I. Joe, G.I. Joe: The Rise of Cobra, playing The Baroness. The film grossed $54 million in the United States during its opening weekend.She appeared in the film Hippie Hippie Shake a Working Title production which starred Cillian Murphy and played the title role in Patrick Marber's After Miss Julie on Broadway.She starred as Patricia in the London production of Flare Path at the Theatre Royal Haymarket in 2011.