Ray Romano

Manny (voice)

John Leguizamo

Sid (voice)

Denis Leary

Diego (voice)

Queen Latifah

Ellie (voice)

Simon Pegg

Buck (voice)

Seann William Scott

Crash (voice)

Josh Peck

Eddie (voice)

Chris Wedge

Scrat (voice)

Karen Disher

Scratte (voice)

Kristen Wiig

Pudgy Beaver Mom (voice)

Harrison Fahn

Glypto Boy (voice)

Maile Flanagan

Aardvark Mom (voice)

Bill Hader

Gazelle (voice)

Kelly Keaton

Molehog Mom / Shovelmouth Mom (voice)

Joey King

Beaver Girl (voice)

Jane Lynch

Diatryma Mom (voice)

Clea Lewis

Start Mom (voice)

Carlos Saldanha

Dinosaur Babies / Flightless Bird (voice)

Claudia Besso

Additional Voice (voice)

Matt Adler

Additional Voice (voice)

Holly Dorff

Additional Voice (voice)

Nicole Ehinger

Additional Voice (voice)

Selenis Leyva

Additional Voice (voice)

David McCharen

Additional Voice (voice)

Devika Parikh

Additional Voice (voice)

Jake Schwencke

Additional Voice (voice)

Johnathan Tchaikovsky

Additional Voice (voice)

Pamala Tyson

Additional Voice (voice)

June Christopher

Additional Voice (voice)

Frank Welker

Momma Dino (voice) (uncredited)