Rex (voice)
John Goodman
Buster (voice)
Blaze Berdahl
Professor Screweyes (voice)
Kenneth Mars
Cecilia (voice)
Yeardley Smith
Stubbs the Clown (voice)
Martin Short
Himself (voice)
Larry King
(voice)
Shelley Thompson
Mother Bird (voice)
Rhea Perlman
Vorb (voice)
Jay Leno
Woog (voice)
René Le Vant
Elsa (voice)
Felicity Kendal
Dweeb (voice)
Charles Fleischer
Captain Neweyes (voice)
Walter Cronkite
Louie (voice)
Joey Shea
Dr. Bleeb (voice)
Julia Child
Executive Producer
Steven Spielberg
Screenplay
John Patrick Shanley
Kathleen Kennedy
Frank Marshall
Original Music Composer
James Horner
Casting
Nancy Nayor
Producer
Steve Hickner
Director
Simon Wells
Ralph Zondag
Novel
Hudson Talbott
Phil Nibbelink
Dick Zondag
Animation
Robert Stevenhagen
Stephan Franck
Layout
Marco Cinello
Valerie McCaffrey
Supervising Music Editor
Jim Henrikson
Co-Producer
Thad Weinlein
Supervising Sound Editor
Campbell Askew