Doctor Peter Venkman

Bill Murray

Doctor Raymond Stantz

Dan Aykroyd

Doctor Egon Spengler

Harold Ramis

Dana Barrett/Zuul, The Gate Keeper

Sigourney Weaver

Louis Tully/Vinz Clortho, The Key Master

Rick Moranis

Winston Zeddemore

Ernie Hudson

Janine Melnitz

Annie Potts

Walter Peck

William Atherton

Mayor

David Margulies

Gozer

Slavitza Jovan

Hotel Manager

Michael Ensign

Male Student

Steven Tash

Female Student

Jennifer Runyon

Librarian

Alice Drummond

Dean Yeager

Jordan Charney

Violinist

Timothy Carhart

Library Administrator

John Rothman

Roger Grimsby

Roger Grimsby

Archbishop

Tom McDermott

Larry King

Larry King

Joe Franklin

Joe Franklin

Casey Kasem (voice)

Casey Kasem

Police Commissioner

Norman Matlock

Police Captain

Joe Cirillo

Police Seargeant

Joe Schmieg

Fire Commissioner

John Ring

Jail Guard

Reginald VelJohnson

Real Estate Woman

Rhoda Gemignani

Man at Elevator

Murray Rubin

Con Edison Man

Larry Dilg

Coachman

Danny Stone

Woman at Party

Patty Dworkin

Tall Woman at Party

Jean Kasem

Doorman

Lenny Del Genio

Chambermaid

Frances Nealy

Hot Dog Vendor

Sam Moses

TV Reporter

Christopher Wynkoop

Businessman in Cab

Winston May

Mayor's Aide

Tommy Hollis

Louis' Neighbor

Eda Reiss Merin

Policeman at Apartment

Ric Mancini

Mrs. Van Hoffman

Kathryn Janssen

Ted Fleming

Paul Trafas

Annette Fleming

Cheryl Birchfield

Library Ghost

Ruth Oliver

Dream Ghost

Kym Herrin

Reporter

Stanley Grover

Reporter

Nancy Kelly

Reporter

Carol Ann Henry

Reporter

James Hardie

Reporter

Frantz Turner

Reporter

Carol Henry

Annette Fleming

Cheryl Birchenfield

Gozer (uncredited)

Paddi Edwards

Dream Ghost

Kymberly Herrin

Zuul

Ivan Reitman

Birthday party kid

Jason Reitman