Larry Kroger (as Thomas Hulce)
Kent Dorfman
Doug Neidermeyer
Mandy Pepperidge
Babs Jansen
Greg Marmalard
Chip Diller
John Blutarsky
Stork
Hardbar (as Christian Miller)
B.B.
Katy
Robert Hoover
Eric Stratton
Donald Schoenstein
Daniel Simpson Day
Mothball
Dave Jennings
Dean Vernon Wormer
Trooper
Mayor Carmine DePasto
Otter's Co-Ed (scenes deleted)
Marion Wormer
Clorette DePasto
Sissy
Charming Guy with Guitar
Otis Day (as DeWayne Jessie)
Brunella (as Eliza Garrett)
Shelly
Beth
Noreen
Mean Dude
Meaner Dude
Meanest Dude (as Reginald H. Farmer)
Gigantic Dude
Dean's Secretary
Omega
Man on Street
Lucky Boy
Sorority Girl
Mongol
Delta Girl (uncredited)
Bluto's Dance Partner at Toga Party (uncredited)
Bandmember - Otis Day and the Knights (uncredited)
Cashier (uncredited)
Girl at Top of Stairs (uncredited)
Party Walla (uncredited)
Delta House Pledge (uncredited)
Party Goer (uncredited)
Grim - Balding Professor (uncredited)
Man Who Measures Dead Horse (uncredited)
Otter's Motel Date (uncredited)