Rodney Dangerfield (Thornton Melon)
Sally Kellerman (Diane)
Burt Young (Lou)
Keith Gordon (Jason Melon)
M. Emmet Walsh (Coach Turnbull)
Robert Downey, Jr. (Derek)
Boris Aplon (Tony Meloni)
Lisa Denton (Lisa)
John William James (Man in Stands)
Eric Alver (Student at Fraternity Party)
Dana Allison (Young Woman)
Kristen Aldrich (Student in Diane's Class)
Sarah Abrell (Sorority Girl)
Curtis Stone ('Twist & Shout' Band)
William Grauer (Drunken Student)
Holly Hayes (Girl in the Crowd)
Jason Hervey (Young Thornton)
Tricia Hill (Lisa's Friend)
Lisa LeCover (Rodette)
Theresa Lyons (Cashier)
Jill D. Merin (Girl at Dorm Party)
Beth Peters (Mrs. Stuyvesant)
Josh Saylor (Student in Diane's Class)
Danny Elfman (Oingo Boingo Band Member)
Brad Zutaut (Petey)
Michael McGrady (Player)
Becky Le Beau (Hot-Tub Girl)
James Ingersoll (Judge)
Leslie Huntly (Coed)
Dallas Winker (Rodette)
Bob Drew (Bob/Contractor)
Kimberlin Ann Brown (Girl in Dorm Hallway)
Nora Boland (Agnes)
Santos Morales (Bartender)
Kimberlee Carlson (Rodette)
Phil Rubenstein (1st Executive)
Tim Stack (Trendy Man)
John Young (2nd Executive)
Steve Sweeney (Security Guard)
Stacey Toten (Hot Tub Girl)
William Zabka (Chas)
Ned Beatty (Dean Martin)
Severn Darden (Dr. Barazini)
Sam Kinison (Prof. Terguson)
Robert Picardo (Giorgio)
Kurt Vonnegut, Jr. (Himself)
Edie McClurg (Marge)
Paxton Whitehead (Philip Barbay)
Adrienne Barbeau (Vanessa)
Terry Farrell (Valerie)