Sean Astin Meerkat Manor Narrator (voice)
Anna Faris Jeanette (voice)
Justin Long Alvin (voice)
Jason Lee Dave
Wendie Malick Dr. Rubin
Zachary Levi Toby
Christina Applegate Brittany (voice)
Amy Poehler Eleanor (voice)
Alexandra Shipp Valentina
Aimee Carrero Emily
Jesse McCartney Theodore (voice)
David Cross Ian
Gregg Binkley Emcee
Matthew Gray Gubler Simon (voice)
Bridgit Mendler Becca
Eric Bauza Digger the NASCAR Gopher (voice)
Ross Bagdasarian, Jr. Producer, Alvin (singing voice) (uncredited)
Bernard White Doctor
Janice Karman Producer, Theodore / The Chipettes (singing voice) (uncredited)
Kathryn Joosten Aunt Jackie
Arnon Milchan Executive Producer
Chris Warren Xander
Anjelah Johnson-Reyes Julie
Paul Sonski Set Designer
Betty Thomas Director
Brando Eaton Jeremy
Steven Lambert Stunts
Lanny Joon Paramedic
Ross Bagdasarian Characters
Jake Zyrus Charice Pempengco
Archie Hahn Agent
Jonathan Aibel Writer
Alicia Stevenson Foley Artist
Joy Osmanski Airline Rep
David Newman Original Music Composer
Glenn Berger Writer
Paul Gonzales Charice Bassist (uncredited)
Casper Smart Dancer (uncredited)
Gee Alexander Simon Dance Double (uncredited)
Julianne Jordan Music Supervisor
Kevin G. Schmidt Ryan
Rachele Brooke Smith Chipette Dancer
Anthony B. Richmond Director of Photography
Chuck Michael Sound Effects Editor
Jeff Carson Music Editor
Lori McCoy-Bell Hair Department Head
Lars Petersen Construction Coordinator
Guy Bar'ely Animation
Brittany Anne Pirtle Cheerleader (uncredited)
Karen Rosenfelt Executive Producer
Juel Bestrop Casting
Jon Vitti Writer
Gary A. Theard Boom Operator
Laura Graham ADR Editor
Willie D. Burton Sound Mixer
Alexandra Welker Costume Design
Scott Curtis Foley Editor
Charles Crivier Key Grip
Dawn Fintor Foley Artist
Nancy MacLeod Sound Effects Editor
Thomasina Gross Chipette Dancer
Rebecca Robertson Script Supervisor
R.J. Kizer ADR Editor
David Lucarelli Sound Recordist
Michael J. Benavente Supervising Sound Editor
John Moio Stunt Coordinator
Marcia Hinds Production Design
Rosero McCoy Choreographer
Richy Jackson Chipmunk Dancer
Gary C. Bourgeois Sound Re-Recording Mixer
Michael Keller Sound Re-Recording Mixer
Marty Dew Chipmunk Dancer