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