John Goodman

Rex (voice)

René Le Vant

Woog (voice)

Felicity Kendal

Elsa (voice)

Charles Fleischer

Dweeb (voice)

Walter Cronkite

Captain Neweyes (voice)

Jay Leno

Vorb (voice)

Joey Shea

Louie (voice)

Yeardley Smith

Cecilia (voice)

Martin Short

Stubbs the Clown (voice)

Kenneth Mars

Professor Screweyes (voice)

Julia Child

Dr. Bleeb (voice)

Blaze Berdahl

Buster (voice)

Rhea Perlman

Mother Bird (voice)

Larry King

Himself (voice)

Shelley Thompson

(voice)