Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online.Sienna Rose Miller (born 28 December 1981) is an American-born English actress, model, and fashion designer, best known for her roles in Layer Cake, Alfie, Factory Girl, and G.I. Joe: The Rise of Cobra.Born in New York City, Miller moved with her family to London, England when she was a year old. She went to Francis Holland Junior School, from the time she was 4 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.