Hilary Erhard Duff (born September 28, 1987) is an American actress, pop singer, songwriter and entrepreneur. After gaining fame for playing the title role in the television show Lizzie McGuire, Duff went on to have a film career; her most commercially successful movies include Cheaper by the Dozen (2003), The Lizzie McGuire Movie (2003), and A Cinderella Story (2004).   Wikipedia