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). She reportedly earned $15 million in 2005. Duff has expanded her repertoire into pop music, with three RIAA certified-platinum albums and over thirteen million albums sold worldwide. She has also launched a clothing line, Stuff by Hilary Duff, and an exclusive perfume with Elizabeth Arden. Duff and her mother were listed as producers for the movie Material Girls, and she will soon produce her sister's debut album.