Sienna Rose Miller is an English American actress, model, and fashion designer.
Born in New York City, Miller moved with her family to London, England, when she was just over a year old. She went to Francis Holland Junior School, from age four to 11. She 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.
Her father, Edwin Miller, is an American banker turned dealer of Chinese art. Her mother, Jo Miller, was born in South Africa and ran Lee Strasberg's acting academy in London. Miller has a sister, Savannah, a fashion designer, two half-brothers, Charles and Stephen, and a stepsister, Natasha Corrett (the daughter of her father's second wife Kelly Hoppen).
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 2006, it was announced that Miller would design a fashion capsule for Pepe Jeans; the project was later expanded to become a complete fashion label. Called Twenty8Twelve, it gets its name from Miller's date of birth and is financially backed by Pepe Jeans. The collection, which Miller designed with her sister Savannah, a professional fashion designer, launched in September 2007.