• 
  John Lounsbery

  regizor

• 
  Larry Clemmons

  scenarist

• 
  Éva Gábor

  Bianca (voce)
• 
  Geraldine Page

  Medusa (voce)
• 
  Bob Newhart

  Bernard (voce)
• 
  Joe Flynn

  Snoops (voce)
• 
  Jeanette Nolan

  Ellie Mae (voce)
• 
  Pat Buttram

  Luke (voce)

• 
  Jim Jordan

  Orville (voce)
• 
  John Fiedler

  Owl
• 
  Ruth Buzzi

  German Mouse
• 
  George Lindsey

  Rabbit
• 
  Michelle Stacy

  Penny
• 
  Robie Lester

  Miss Bianca
• 
  Robert George

  Bernard

• 
  James MacDonald

  Evinrude
• 
  Larry Clemmons

  Gramps
• 
  Dub Taylor

  Digger
• 
  Bernard Fox

  The Chairman
• 
  John McIntire

  Rufus
• 
  Eva Gabor

  Miss Bianca
• 
  Jim Jordan

  Orville
• 
  Bill McMillian

  TV Announcer (voice) (as Bill McMillan)