Anna Faris Jeanette (voice)
Sean Astin Meerkat Manor Narrator (voice)
Wendie Malick Dr. Rubin
David Cross Ian
Zachary Levi Toby
Justin Long Alvin (voice)
Jason Lee Dave
Alexandra Shipp Valentina
Eric Bauza Digger the NASCAR Gopher (voice)
Amy Poehler Eleanor (voice)
Christina Applegate Brittany (voice)
Jon Vitti Writer
Matthew Gray Gubler Simon (voice)
Aimee Carrero Emily
Willie D. Burton Sound Mixer
Jonathan Aibel Writer
Brando Eaton Jeremy
Glenn Berger Writer
Arnon Milchan Executive Producer
Jesse McCartney Theodore (voice)
Matthew Friedman Editor
Kevin G. Schmidt Ryan
David Newman Original Music Composer
Bernard White Doctor
Rachele Brooke Smith Chipette Dancer
Julianne Jordan Music Supervisor
Anjelah Johnson-Reyes Julie
Lori McCoy-Bell Hair Department Head
Lanny Joon Paramedic
Gregg Binkley Emcee
Bridgit Mendler Becca
Alicia Stevenson Foley Artist
Joy Osmanski Airline Rep
David Lucarelli Sound Recordist
R.J. Kizer ADR Editor
Ross Bagdasarian, Jr. Producer, Alvin (singing voice) (uncredited)
Betty Thomas Director
John Moio Stunt Coordinator
Michael J. Benavente Supervising Sound Editor
Gary A. Theard Boom Operator
Steven Lambert Stunts
Laura Graham ADR Editor
Chuck Michael Sound Effects Editor
Janice Karman Producer, Theodore / The Chipettes (singing voice) (uncredited)
Juel Bestrop Casting
Doug Jackson Sound Effects Editor
Kathryn Joosten Aunt Jackie
Mildred Iatrou Supervising Sound Editor
John Murray Foley Supervisor
Daniel DiPrima Supervising Music Editor
Chris Warren Xander
Cheri Minns Makeup Department Head
Guy Bar'ely Animation
Seth Yanklewitz Casting
Karen Rosenfelt Executive Producer
Dawn Fintor Foley Artist
Richy Jackson Chipmunk Dancer
Gary C. Bourgeois Sound Re-Recording Mixer
Scott Curtis Foley Editor
Gee Alexander Simon Dance Double (uncredited)
David 'Goldy' Goldsmith Video Assist Operator
David Betancourt Foley Mixer
Charles Crivier Key Grip
Julie D'Antoni Visual Effects
Steven R. Mathis Gaffer
Jeff Carson Music Editor
David Lautman High School Student (uncredited)
Ross Bagdasarian Characters
Steve Terada Li'l Rosero Dancer
Paul Sonski Set Designer
Bo Johnson Art Direction
Nancy MacLeod Sound Effects Editor