Hilary Erhard Duff (born September 28, 1987) is an American actress, singer, songwriter, entrepreneur, author, and humanitarian. Born and raised in Houston, Texas, Duff appeared in local theatre productions and television commercials before coming to prominence in the title role of Disney Channel's teen comedy Lizzie McGuire. Established as a teen idol, Duff reprised that role in The Lizzie McGuire Movie (2003) and ventured into motion pictures with her early films Agent Cody Banks (2003), Cheaper by the Dozen (2003), A Cinderella Story (2004) and Cheaper by the Dozen 2 (2005) being among the biggest commercial successes of her career. Most recently, she has performed in a string of independent films with notable roles in War, Inc. (2007) and Bloodworth (2011) and television dramas, such as Gossip Girl, in addition to sharing production credits.
After signing with Hollywood Records, Duff expanded her repertoire to include pop music and has released several albums. Her debut studio album Metamorphosis (2003) was RIAA-certified triple platinum while the subsequent studio album Hilary Duff (2004) and compilation album Most Wanted (2005) were both certified platinum. She exhibited a more adult image with the release of Dignity (2007), which displayed a shift to more of a dance-oriented sound. Certified gold, the album spawned her highest charting US single to date "With Love" which also peaked at number 1 on Billboard's Hot Dance Club Songs chart, becoming the first of her three consecutive number ones on that chart. Prior to the release of Best of Hilary Duff (2008), a compilation of her greatest hits, Duff had sold thirteen million albums worldwide and had performed across the world on four concert tours.