Peter Riegert as Donald 'Boon' Schoenstein
Thomas Hulce as Lawrence 'Pinto' Kroger
Stephen Furst as Kent 'Flounder' Dorfman
Bruce McGill as Daniel Simpson Day, 'D-Day'
James Widdoes as Robert Hoover
Douglas Kenney as 'Stork'
James Daughton as Gregory Marmalard
Mark Metcalf as Douglas C. Neidermeyer
Verna Bloom as Marion Wormer
Karen Allen as Katy
Sarah Holcomb as Clorette DePasto
DeWayne Jessie as Otis Day
Mary Louise Weller as Mandy Pepperidge
Martha Smith as Barbara Sue 'Bab'" Jansen
Sean McCartin as 'Lucky Boy'
has two frat houses very different from one another. One has no standards whatsoever and will take anyone in, while the other is full of rich white men who are not popular with the rest of school except for Dean Wormer. The dean has the second frat house try to get the Delta House
boys off campus, for he cannot stand any of them.