Dave

Jason Lee

Acting

Ian

David Cross

Acting

Zoe

Jenny Slate

Acting

Alvin (voice)

Justin Long

Acting

Simon (voice)

Matthew Gray Gubler

Acting

Theodore (voice)

Jesse McCartney

Acting

Eleanor (voice)

Amy Poehler

Acting

Jeanette (voice)

Anna Faris

Acting

Brittany (voice)

Christina Applegate

Acting

Simone (voice)

Alan Tudyk

Acting

Hawaiian Shirt Guy

Michael P. Northey

Acting

Club Woman #1

Sophia Aguiar

Acting

Club Woman #2

Lauren Gottlieb

Acting

Club Woman #3

Tera Perez

Acting

Captain Correlli

Andy Buckley

Acting

Waiter

Chad Krowchuk

Acting

Tessa

Luisa d'Oliveira

Acting

Tucker / Kite Kid

Tucker Albrizzi

Acting

Casino Guy

Nelson Wong

Acting

Excursion Clerk

Michael Bagdasarian

Acting

Damsel #1

Amber-Rochelle DeMarco

Acting

Damsel #2

Marcela Caceres

Acting

Damsel #3

Natalie Sutcliffe

Production

Monster

Ian Harmon

Acting

Flight Attendant

Phyllis Smith

Acting

Alvin (singing voice) (uncredited)

Ross Bagdasarian, Jr.

Acting

Theodore / The Chipettes (singing voice) (uncredited)

Janice Karman

Acting

Music Executive (uncredited)

Eoin Bates

Acting

Additional Voices (voice) (uncredited)

Seth Robert Dusky

Acting

Cruise Guest (uncredited)

Wendell Kinney

Acting

Cruise Guy (uncredited)

Jeremy Palko

Acting

Model (uncredited)

Rachael Wegener

Acting