Pop sensations Alvin, Simon and Theodore end up in the care of Dave Seville's twenty-something nephew Toby. The boys must put aside music super stardom to return to school, and are tasked with saving the school's music program by winning the $25,000 prize in a battle of the bands. But the Chipmunks unexpectedly meet their match in three singing chipmunks known as The Chipettes - Brittany, Eleanor and Jeanette. Romantic and musical sparks are ignited when the Chipmunks and Chipettes square off.
Zachary Levi
as Toby
David Cross
as Ian
Jason Lee
as Dave
Justin Long
as Alvin (voice)
Matthew Gray Gubler
as Simon (voice)
Jesse McCartney
as Theodore (voice)
Amy Poehler
as Eleanor (voice)
Anna Faris
as Jeanette (voice)
Christina Applegate
as Brittany (voice)
Wendie Malick
as Dr. Rubin
Anjelah Johnson-Reyes
as Julie
Kathryn Joosten
as Aunt Jackie
