John "Bluto" Blutarsky

John Belushi

Katy

Karen Allen

Chip Diller

Kevin Bacon

Otter

Tim Matheson

Prof. Dave Jennings

Donald Sutherland

Larry 'Pinto' Kroger

Tom Hulce

Boon

Peter Riegert

Kent "Flounder" Dorfman

Stephen Furst

Doug Neidermeyer

Mark Metcalf

Dean Vernon Wormer

John Vernon

Mandy Pepperidge

Mary Louise Weller

Barbara Sue 'Babs' Jansen

Martha Smith

Marion Wormer

Verna Bloom

Mayor Carmine DePasto

Cesare Danova

Greg Marmalard

James Daughton

Clorette DePasto

Sarah Holcomb

D-Day

Bruce McGill

Robert Hoover

James Widdoes

Otis Day

DeWayne Jessie

Shelly

Lisa Baur

Stork

Douglas Kenney

Hardbar

Chris Miller

Mothball

Joshua Daniel

B.B.

Bruce Bonnheim

Otter's Co-Ed

Sunny Johnson

Sissy

Stacy Grooman

Brunella

Eliza Roberts

Charming Guy with Guitar

Stephen Bishop

Beth

Aseneth Jurgenson

Noreen

Katherine Denning

Mean Dude

Raymone Robinson

Meaner Dude

Robert Elliott

Meanest Dude

Reginald H. Farmer

Meanest Dude

Reginald Farmer

Huge Dude

Jebidiah R. Dumas

Dean's Secretary

Priscilla Lauris

Omega

Rick Eby

Man on Street

John Freeman

Lucky Boy

Sean McCartin

Sorority Girl

Helen Vick

Mongol

Rick Greenough

Meaner Dude

Robert Irvin Elliott

Cafeteria Dishwasher

John Landis

(uncredited) Bandmember, Otis Day and the Knights

Robert Cray

Daniel Peacock

Nick Berry

Caroline Quentin

Karl Howman

Kim Thomson