Sienna Rose Diana Miller is an American-British actress. Born in New York City and raised in London, she began her career as a model, appearing in the pages of Italian Vogue and for the 2003 Pirelli Calendar. Her acting breakthrough came in the 2004 films Layer Cake and Alfie. She portrayed socialite Edie Sedgwick in Factory Girl (2006) and author Caitlin Macnamara in The Edge of Love (2008), and was nominated for the BAFTA Rising Star Award in 2008. Her role as The Baroness in G.I. Joe: The Rise of Cobra (2009) was followed by a brief sabbatical from the screen amid increased tabloid scrutiny.