Alvin and the Chipmunks: The Squeakquel is a 2009 American musical comedy film directed by Betty Thomas and written by Jon Vitti, Jonathan Aibel, and Glenn Berger. Based on Alvin and the Chipmunks by Ross Bagdasarian Sr., and the fictional girl group The Chipettes by Janice Karman, it is the second installment in the live-action Alvin and the Chipmunks film series and sequel to Alvin and the Chipmunks (2007) and prequel to Alvin and the Chipmunks: Chipwrecked (2011) and Alvin and the Chipmunks: The Road Chip (2015). The film stars Zachary Levi, Jason Lee, and David Cross, with Justin Long, Matthew Gray Gubler and Jesse McCartney reprise their roles from the first film as the Chipmunks with newcomers Christina Applegate, Amy Poehler and Anna Faris joining the voice cast as the Chipettes. The film sees the Chipmunks entering high school under the care of Dave Seville's cousin, Toby. Meanwhile, Ian Hawke recruits the Chipettes to restore his career.