Sienna Rose Diana Miller (born 28 December 1981) is an English American actress and model. She began her career appearing in crime thriller Layer Cake, followed by Alfie (both 2004). In 2006, Miller portrayed the lead in Factory Girl, and a supporting role in Stardust (2007). In 2008, she was nominated for a BAFTA Rising Star Award. Sienna appeared in the television film The Girl (2012). She was nominated for a BAFTA Television Award for Best Actress and a Golden Globe Award for Best Actress.