Kurt Russell as Dexter Reilly

Cesar Romero as A.J. Arno

Joe Flynn as Dean Eugene (E.J.) Higgins

Jim Backus as Timothy Forsythe

William Windom as Professor Lufkin

Frank Welker as Myles

Joyce Menges as Debbie Dawson

Michael McGreevey as Richard Schuyler

Richard Bakalyan as Cookie

Alan Hewitt as Dean Collingsgood

Kelly Thordsen as Sgt. Cassidy

Bing Russell as Alfred

George O'Hanlon as Ted

Robert Rothwell as Driver

Frank Aletter as TV Announcer

Dave Willock as Mr. Burns

Edward Andrews as Mr. Sampson

Jack Bender as Slither Roth

Mike Evans as Henry Fathington

Ed Begley Jr. as Druffle

Paul Smith as Road Block Officer

Larry Gelman as Professor (uncredited)

Alvin Hammer as Elwood (uncredited)

Kenner G. Kemp as Reporter (uncredited)

Burt Mustin as Mr. Reed (uncredited)

Eddie Quillan as Charlie, School Custodian (uncredited)

Benny Rubin as Golfer (uncredited)

Jeffrey Sayre as Budget Meeting Attendee (uncredited)

Leon Alton as Executive (uncredited)

Paul Bradley as Party Guest (uncredited)

Dick Cherney as Party Guest (uncredited)

Edward Faulkner as Mike - Bank Guard (uncredited)

Bobby Gilbert as Man on Street (uncredited)

Murray Pollack as Game Spectator (uncredited)

Tony Regan as Awards Guest (uncredited)

Al Roberts as Game Spectator (uncredited)

Clark Ross as Party Guest (uncredited)

Cosmo Sardo as Game Spectator (uncredited)

Arthur Tovey as Party Guest (uncredited)

Chalky Williams as Game Spectator (uncredited)