Character Name : Dave

Original Name : Jason Lee

Gender : Male

Character Name : Ian

Original Name : David Cross

Gender : Male

Character Name : Claire

Original Name : Cameron Richardson

Gender : Female

Character Name : Gail

Original Name : Jane Lynch

Gender : Female

Character Name : Alvin (voice)

Original Name : Justin Long

Gender : Male

Character Name : Simon (voice)

Original Name : Matthew Gray Gubler

Gender : Male

Character Name : Theodore (voice)

Original Name : Jesse McCartney

Gender : Male

Character Name : Female Intern 1

Original Name : Allison Karman

Gender : Female

Character Name : Female Intern 2

Original Name : Tiara Parker

Gender : Female

Character Name : Female Intern 3

Original Name : Kira Verrastro

Gender : Male

Character Name : Amy

Original Name : Veronica Alicino

Gender : Female

Character Name : Mother in Store

Original Name : Beth Riesgraf

Gender : Female

Character Name : Vet

Original Name : Adriane Lenox

Gender : Female

Character Name : Engineer

Original Name : Don Tiffany

Gender : Male

Character Name : Director

Original Name : Lorne Green

Gender : Male

Character Name : Ted

Original Name : Kevin Symons

Gender : Male

Character Name : Barry

Original Name : Frank Maharajh

Gender : Male

Character Name : Photographer

Original Name : Greg 'G-Spot' Siebel

Gender : Male

Character Name : Butler

Original Name : Oliver Muirhead

Gender : Male

Character Name : Security Guard

Original Name : Jayden Lund

Gender : Male

Character Name : Press Coordinator

Original Name : Erin Chambers

Gender : Female

Character Name : Jillian Reynolds

Original Name : Jillian Warry Barberie

Gender : Female

Character Name : DJ

Original Name : Chris Classic

Gender : Male

Character Name : French Doll (voice)

Original Name : Adam Riancho

Gender : Male

Character Name : Spanish Doll (voice)

Original Name : Axel Alba

Gender : Male

Character Name : Choreographer

Original Name : Rosero McCoy

Gender : Male

Character Name : Dancer

Original Name : Alexis Boyd

Gender : Male

Character Name : Dancer

Original Name : Criscilla Anderson

Gender : Male

Character Name : Dancer

Original Name : Kevin Fisher

Gender : Male

Character Name : Dancer

Original Name : Kyndra Reevey

Gender : Male

Character Name : Dancer

Original Name : Tucker Barkley

Gender : Male

Character Name : Dancer

Original Name : Celestina Aladekoba

Gender : Female

Character Name : Dancer

Original Name : Laura Edwards

Gender : Female

Character Name : Dancer

Original Name : Christopher Scott

Gender : Male

Character Name : Dancer

Original Name : Miss Prissy

Gender : Female

Character Name : Dancer

Original Name : Bryan Gaw

Gender : Male

Character Name : Dancer

Original Name : Michelle Maniscalco

Gender : Female

Character Name : Dancer

Original Name : Nick Drago

Gender : Male

Character Name : Dancer

Original Name : Melanie Lewis

Gender : Female

Character Name : Poolside Girl (uncredited)

Original Name : Natalie Cohen

Gender : Female

Character Name : Alvin (singing voice) (uncredited)

Original Name : Ross Bagdasarian, Jr.

Gender : Male

Character Name : Theodore (singing voice) (uncredited)

Original Name : Janice Karman

Gender : Male

Character Name : Band Member (uncredited)

Original Name : Lisa Mason Lee

Gender : Female

Character Name : Alvin's Fan (uncredited)

Original Name : Meghan Noone

Gender : Male

Character Name : Dancer (uncredited)

Original Name : Chris Rossi

Gender : Male

Character Name : Band Roadie (uncredited)

Original Name : Jameel Saleem

Gender : Male

Character Name : Dancing DJ (uncredited)

Original Name : Melanie Stephens

Gender : Female