From Wikipedia, the free encyclopedia. Hilary Erhard Duff (born September 28, 1987) is an American actress, singer song-writer and book author. After working in local theater plays and television commercials in her childhood, Duff gained fame for playing the title role in the Disney Channel television series Lizzie McGuire. She subsequently ventured into motion pictures and has many successful films to her credit including The Lizzie McGuire Movie, Cheaper by the Dozen, A Cinderella Story and Cheaper by the Dozen 2. She has most recently appeared in According to Greta and Stay Cool. As of December 2010, her upcoming films include, Bloodworth, The Story of Bonnie and Clyde, and She Wants Me. Duff has since expanded her repertoire into pop music with the release of three RIAA-certified platinum albums: Metamorphosis, her debut studio album, was certified triple platinum and was supplemented by a further two platinum albums, Hilary Duff and Most Wanted. In 2007, she released her third studio album, Dignity, which was certified gold later than year and spawned singles With Love – her highest charting US single to date – and Stranger. Best of Hilary Duff, a compilation of her greatest hits, was released in the last quarter of 2008 producing her a third #1 on Billboards Hot Dance Club Songs with the single Reach Out. Duff has sold over thirteen million records worldwide; her contributions to the music industry have gained her commercial and critical success worldwide while Billboard ranked her the 69th Artist of the 2000s decade. Branching into the fashion industry, Duff has also launched her own clothing lines, Stuff by Hilary Duff and Femme for DKNY Jeans, and two exclusive perfume collections with Elizabeth Arden as well as having been signed on to modelling agency IMG Models. Other business ventures include writing a young adult novel Elixir and being accredited as an executive producer for According to Greta and a producer for the films Material Girls and Beauty & the Briefcase.