Hilary Erhard Duff (born September 28, 1987) is an American actress, singer, songwriter, businesswoman, producer, and writer. Duff began her acting career at a young age and quickly became labeled a teen idol as the title character of the television series "Lizzie McGuire" (2001–2004) and in the film based on the series, "The Lizzie McGuire Movie" (2003). Thereafter she gained numerous leading roles, in films such as "Cadet Kelly" (2002), "Agent Cody Banks" (2003), "Cheaper by the Dozen" (2003), "A Cinderella Story" (2004), and "Cheaper by the Dozen 2" (2005). She later appeared in independent films playing a wider range of roles, such as a promiscuous popstar in "War, Inc." (2008), a suicidal, rebellious teenager in "According to Greta" (2009), and as the dramatic title character in the controversial horror-thriller film "The Haunting of Sharon Tate" (2019), inspired by the real life Tate–LaBianca murders. She also executive produced several of the projects she starred in. From 2015 until 2021 Duff starred as Kelsey Peters in TV Land’s longest-running original comedy series Younger, for which she received two People's Choice Awards nominations for the role in 2016 and 2017 respectively.