Peter Venkman
Ray Stantz
Dana Barrett
Egon Spengler
Louis Tully
Janine Melnitz
Walter Peck
Winston Zeddemore
Gozer
Mayor
Male Student
Female Student
Hotel Manager
Librarian
Dean Yager
Violinist
Library Administrator
Archbishop
Roger Grimsby
Larry King
Joe Franklin
Casey Kasem (voice)
Fire Commissioner
Police Commissioner
Police Captain
Police Seargeant
Jail Guard
Real Estate Woman
Man at Elevator
Con Edison Man
Coachman
Woman at Party
Tall Woman at Party
Doorman
Chambermaid
Hot Dog Vendor
TV Reporter
Businessman in Cab
Mayor's Aide
Louis's Neighbor
Policeman at Apartment
Mrs. Van Hoffman
Reporter
Ted Fleming
Annette Fleming
Library Ghost
Dream Ghost
Stay Puft Marshmallow Man (uncredited)
Boy at Hot Dog Stand (uncredited)
T-Shirt Vendor (uncredited)
Man Fleeing Marshmallow Man (uncredited)
Patrolman Matthews (uncredited)
Gozer (voice) (uncredited)
Redheaded Man (uncredited)
Hare Krishna acolyte (uncredited)
Birthday Girl in Tavern on the Green (uncredited)
Student at Columbia University (uncredited)
Library Patron (uncredited)
Man Behind Barricade (uncredited)
Man in Taxi (uncredited)
Man at Library (uncredited)
Reporter (uncredited)
City Hall Cop (uncredited)
Terror Dog (uncredited)
Zuul / Slimer (voice) (uncredited)
Prisoner (uncredited)
Bill Walton (uncredited)
Slimer (uncredited)