演员

• Robin Williams — Professor Phillip Brainard
• Marcia Gay Harden — Sara Jean Reynolds
• Christopher McDonald — Wilson Croft
• Raymond J. Barry — Chester Hoenicker
• Clancy Brown — Smith
• Ted Levine — Wesson
• Wil Wheaton — Bennett Hoenicker
• Edie McClurg — Martha George
• Scott Michael Campbell — Dale Jepner
• Jodi Benson — Weebo
• Leslie Stefanson — Sylvia
• Malcolm Brownson — Father
• Benjamin Brock — Window Boy
• Dakin Matthews — Minister
• Zack Zeigler — Teenage Boy
• Sam Lloyd — Willy Barker
• Bob Sarlatte — Rutland Coach
• Bob Greene — Referee
• Tom Barlow — Medfield Basketball Player
• Scott Martin Gershin — Flubber
• Julie Morrison — Weebette