Sigourney Weaver Dana Barrett
Bill Murray Peter Venkman
Dan Aykroyd Screenplay, Ray Stantz
Annie Potts Janine Melnitz
Timothy Carhart Violinist
Ernie Hudson Winston Zeddemore
William Atherton Walter Peck
Rick Moranis Louis Tully
Harold Ramis Screenplay, Egon Spengler
Chuck Gaspar Special Effects Supervisor
Tom McDermott Archbishop
Ivan Reitman Director, Producer, Zuul / Slimer (voice) (uncredited)
Sam Moses Hot Dog Vendor
Casey Kasem Casey Kasem (voice)
Reginald VelJohnson Jail Guard
László Kovács Director of Photography
Kathryn Janssen Mrs. Van Hoffman
Jordan Charney Dean Yager
John Bruno Visual Effects Art Director
John Rothman Library Administrator
David Margulies Mayor
Michael Ensign Hotel Manager
Elmer Bernstein Original Music Composer
Jim Aupperle Visual Effects Camera
Larry King Larry King
Joseph E. Thibo First Assistant Camera
Robert M. Stevens Camera Operator
Rhoda Gemignani Real Estate Woman
Mario Todisco Prisoner (uncredited)
Paddi Edwards Gozer (voice) (uncredited)
Joe Medjuck Man at Library (uncredited), Associate Producer
Jennifer Runyon Female Student
Norman Matlock Police Commissioner
Gemma La Mana Still Photographer
Les Fresholtz Sound Re-Recording Mixer
Katterli Frauenfelder Second Assistant Director
Richard Beggs Sound Designer
Tommy Hollis Mayor's Aide
Richard Edlund Visual Effects
Dione Taylor Hairstylist
Alice Drummond Librarian
Slavitza Jovan Gozer
Larry Holt Stunts
Debbie Gibson Birthday Girl in Tavern on the Green (uncredited)
Willow Hale Student at Columbia University (uncredited)
Bill Walton Bill Walton (uncredited)
Colin J. Campbell Gaffer
Roger Grimsby Roger Grimsby
Eldo Ray Estes Redheaded Man (uncredited)
Frank Rivers Prisoner (uncredited)
Marvin March Set Decoration
Leonard Engelman Makeup Artist
Tom Morga Stunt Double
Frank Patton III City Hall Cop (uncredited)
Rick Alexander Sound Re-Recording Mixer
Ray Parker, Jr. Theme Song Performance
Joe Cirillo Police Captain
Billy Bryan Stay Puft Marshmallow Man (uncredited)
Eda Reiss Merin Louis's Neighbor
Stanley Grover Reporter
Ric Mancini Policeman at Apartment
Jean Kasem Tall Woman at Party
Gene Kearney Key Grip
Murray Rubin Man at Elevator
Christopher Wynkoop TV Reporter
David E. Blewitt Editor
Sheldon Kahn Editor
John DeCuir Jr. Art Direction
Danny Nero Reporter (uncredited)
Jack E. Ackerman Property Master
Frantz Turner Reporter
Steven Tash Male Student