Hilary Erhard Duff (born September 28, 1987) is an American actress and singer. Duff began to expand her career into theatrical films, with leading roles in projects such as Agent Cody Banks (2003), Cheaper by the Dozen (2003), A Cinderella Story (2004), and Cheaper by the Dozen 2 (2005). She continued to have success in music, with her albums Hilary Duff (2004) and Most Wanted(2005) achieving Platinum status in the United States