Sienna Rose Diana Miller (born 28 December 1981) is an English actress, model and fashion designer. She is best known for her roles in Layer Cake, Alfie, Factory Girl, The Edge of Love and G.I. Joe: The Rise of Cobra. In 2006, she designed a fashion capsule for Pepe Jeans. Miller has been nominated for a BAFTA (2008) and Golden Globe (2012).