Näyttelijät

• Bob Newhart — Bernard (voice)
• Eva Gabor — Miss Bianca (voice)
• George C. Scott — McLeach (voice)
• Douglas Seale — Krebbs (voice)
• Frank Welker — Joanna (voice)
• Bernard Fox — Chairman / Doctor (voice)
• Peter Firth — Red (voice)
• Ed Gilbert — Francois (voice)
• Russi Taylor — Nurse Mouse (voice)
• John Candy — Wilbur (voice)
• Tristan Rogers — Jake (voice)
• Adam Ryen — Cody (voice)
• Wayne Robson — Frank (voice)
• Peter Greenwood — Radio Announcer / Airplane Captain (voice)
• Billy Barty — Baitmouse (voice)
• Jack Angel — Additional Voices (voice)