Steve Zahn Runt of the Litter (voice)
Catherine O'Hara Tina - Alien Mom (voice)
Joan Cusack Abby Mallard (voice)
Patrick Stewart Mr. Woolensworth (voice)
Patrick Warburton Alien Cop (voice)
Wallace Shawn Principal Fetchit (voice)
Amy Sedaris Foxy Loxy (voice)
Don Knotts Mayor Turkey Lurkey (voice)
Fred Willard Melvin - Alien Dad (voice)
Zach Braff Chicken Little (voice)
Adam West Ace - Hollywood Chicken Little (voice)
Chris Edgerly Additional Voices (voice)
Scott Menville Additional Voices (voice)
Joe Grant In Memory Of
Harry Shearer Dog Announcer (voice)
Terri Douglas Additional Voices (voice)
Mona Marshall Additional Voices (voice)
Garry Marshall Buck Cluck (voice)
Nathan Kress Additional Voices (voice)
David Reynolds Additional Dialogue, Other
Mark Dindal Director, Morkubine Porcupine / Coach (voice), Story
Will Finn Hollywood Fish (voice)
Pat Fraley Additional Voices (voice)
Joe Whyte Rodriguez / Acorn Mascot / Umpire (voice)
Earl Ghaffari Music Editor
John Debney Original Music Composer
Aaron Spann Additional Voices (voice)
Mark Walton Goosey Loosey (voice)
David E. Fluhr Sound Re-Recording Mixer
Mark Kennedy Story, Hollywood Runt (voice), Head of Story
Mary Hidalgo Casting
Julianne Buescher Additional Voices (voice)
Brian Kesinger Layout
Ron Anderson Screenplay
Eddie Frierson Additional Voices (voice)
Jeff Sawyer Sound Effects Editor
Matsune Suzuki Visual Development
Peter Del Vecho Associate Producer
Ian Gooding Art Direction
Nik Ranieri Supervising Animator
Vera Pacheco Animation
Jin Kim Animation
Hi-Hat Choreographer
Christian P. Minkler Sound Re-Recording Mixer
Steve Bencich Screenplay
Jeff Carson Music Editor
Rick Moore Layout
Adam Kopald Sound Effects Editor
Matthew Jon Beck Casting
Jen Rudin Casting
Dara McGarry Hollywood Abby (voice)
Randy Fullmer Producer
Allen Blaisdell Layout
Thomas Baker Layout
Doug Bennett Supervising Animator
Brittney Lee Harvey Additional Voices (voice)
Eamonn Butler Animation Supervisor
Kelly Hoover Mama Runt (voice)
Kevin Geiger CG Supervisor
Robert L. Sephton Sound Designer, Supervising Sound Editor
Jim Harrison Music Editor
Sandra Tsing Loh Additional Dialogue
Dick Zondag Supervising Animator
Steve Goldberg Visual Effects Supervisor
Alessandro Jacomini Visual Development
Tony Smeed Supervising Animator
Thomas Cardone Visual Development
Doug Walker Layout
Leonard Robledo Visual Development
Adolph Lusinsky Visual Development
David Womersley Production Design
Matthew Josten Kirby - Alien Kid (voice)