John Leguizamo Sid (voice)
Joey King Beaver Girl (voice)
Simon Pegg Buck (voice)
Bill Hader Gazelle (voice)
Denis Leary Diego (voice)
Seann William Scott Crash (voice)
Kristen Wiig Pudgy Beaver Mom (voice)
Queen Latifah Ellie (voice), Songs
Frank Welker Momma Dino / Rudy (voice) (uncredited)
Ray Romano Manny (voice)
Jane Lynch Diatryma Mom (voice)
Maile Flanagan Aardvark Mom (voice)
Josh Peck Eddie (voice)
Chris Renaud Additional Storyboarding
Carlos Saldanha Dinosaur Babies / Flightless Bird (voice), Director
Lucas Leguizamo Aardvark Boy / Beaver Kid #2 (voice)
Selenis Leyva Additional Voice (voice)
Allegra Leguizamo Aardvark Girl (voice)
John Powell Original Music Composer
Mike Reiss Screenplay
Clea Lewis Start Mom (voice)
Chris Wedge Scrat (voice), Executive Producer
Randy Thom Sound Designer, Sound Re-Recording Mixer
Matt Adler Additional Voice (voice)
June Christopher Additional Voice (voice)
Michael Thurmeier Co-Director
Gwendolyn Yates Whittle Supervising Sound Editor
Jana Vance Foley
Richard Hymns ADR Editor
Peter de Sève Character Designer
Pamala Tyson Additional Voice (voice)
Pete Anthony Orchestrator
Christian Kaplan Casting
Shawn Murphy Scoring Mixer
Devika Parikh Additional Voice (voice)
Peter Ackerman Screenplay
Dennie Thorpe Foley
Yoni Brenner Screenplay
Karen Disher Scratte (voice), Storyboard Artist
David McCharen Additional Voice (voice)
Lora Hirschberg Sound Re-Recording Mixer
George Doering Musician
Steve Alterman Additional Voice (voice)
Harrison Fahn Glypto Boy (voice)
Bea Miller Additional Voice / ADR Group (voice)
Conrad Pope Orchestrator
Sofia Scarpa Saldanha Molehog Girl 2 (voice)
Jason Fricchione Adult Molehog Male (voice), Editorial Manager
Claudia Besso Additional Voice (voice)
John C. Donkin Producer
Johnathan Tchaikovsky Additional Voice (voice)
Rick Giovinazzo Orchestrator
Wesley Mandell Lighting Artist
Holly Dorff ADR Voice Casting, Additional Voice (voice)
Kyrsten Mate Sound Effects Editor
Michael Berg Screenplay
Lori Forte Producer
Jeff Biancalana Storyboard Artist
Eric Favela Storyboard Artist
Nicole Ehinger Additional Voice (voice)
Harry Hitner Editor
Trevor Jimenez Storyboard Artist
Joseph Romano Ronald (Shovelmouth Boy) (voice)
Kelly Keaton Molehog Mom / Shovelmouth Mom (voice)
Wilbert Plijnaar Additional Storyboarding
Kevin Kliesch Orchestrator
Cheryl Nardi Dialogue Editor
Jason Carter Eaton Story
Eric Bradley Musician
Philip Rogers ADR & Dubbing
Dave Metzger Orchestrator
Tim Nordquist Additional Voice (voice)