Bill Murray
Peter Venkman
Dan Aykroyd
Ray Stantz
Sigourney Weaver
Dana Barrett
Harold Ramis
Egon Spengler
Rick Moranis
Louis Tully
Annie Potts
Janine Melnitz
William Atherton
Walter Peck
Ernie Hudson
Winston Zeddemore
Slavitza Jovan
Gozer
David Margulies
Mayor
Steven Tash
Male Student
Jennifer Runyon
Female Student
Michael Ensign
Hotel Manager
Alice Drummond
Librarian
Jordan Charney
Dean Yager
Timothy Carhart
Violinist
John Rothman
Library Administrator
Tom McDermott
Archbishop
Roger Grimsby
Roger Grimsby
Larry King
Larry King
Joe Franklin
Joe Franklin
Casey Kasem
Casey Kasem (voice)
John Ring
Fire Commissioner
Norman Matlock
Police Commissioner
Joe Cirillo
Police Captain
Joe Schmieg
Police Seargeant
Reginald VelJohnson
Jail Guard
Rhoda Gemignani
Real Estate Woman
Murray Rubin
Man at Elevator
Larry Dilg
Con Edison Man
Danny Stone
Coachman
Patty Dworkin
Woman at Party
Jean Kasem
Tall Woman at Party
Lenny Del Genio
Doorman
Frances E. Nealy
Chambermaid
Sam Moses
Hot Dog Vendor
Christopher Wynkoop
TV Reporter
Winston May
Businessman in Cab
Tommy Hollis
Mayor's Aide
Eda Reiss Merin
Louis's Neighbor
Ric Mancini
Policeman at Apartment
Kathryn Janssen
Mrs. Van Hoffman
Stanley Grover
Reporter
Carol Ann Henry
Reporter
James Hardie
Reporter
Frantz Turner
Reporter
Nancy Kelly
Reporter
Paul Trafas
Ted Fleming
Cheryl Birchenfield
Annette Fleming
Ruth Oliver
Library Ghost
Kymberly Herrin
Dream Ghost
Billy Bryan
Stay Puft Marshmallow Man (uncredited)
Matteo Cafiso
Boy at Hot Dog Stand (uncredited)
Frankie Como
T-Shirt Vendor (uncredited)
Peter Costanza
Man Fleeing Marshmallow Man (uncredited)
John De Bello
Patrolman Matthews (uncredited)
Paddi Edwards
Gozer (voice) (uncredited)
Eldo Ray Estes
Redheaded Man (uncredited)
Brute Force
Hare Krishna acolyte (uncredited)
Debbie Gibson
Birthday Girl in Tavern on the Green (uncredited)
Willow Hale
Student at Columbia University (uncredited)
Jon Hayden
Library Patron (uncredited)
Joseph Marzano
Man in Taxi (uncredited)
Joe Medjuck
Man at Library (uncredited)
Danny Nero
Reporter (uncredited)
Frank Patton III
City Hall Cop (uncredited)
Harrison Ray
Terror Dog (uncredited)
Ivan Reitman
Zuul / Slimer (voice) (uncredited)
Frank Rivers
Prisoner (uncredited)
Mario Todisco
Prisoner (uncredited)
Bill Walton
Bill Walton (uncredited)
Mark Bryan Wilson
Slimer (uncredited)