Bill Murray

Character: Peter Venkman

Dan Aykroyd

Character: Ray Stantz

Sigourney Weaver

Character: Dana Barrett

Harold Ramis

Character: Egon Spengler

Rick Moranis

Character: Louis Tully

Annie Potts

Character: Janine Melnitz

William Atherton

Character: Walter Peck

Ernie Hudson

Character: Winston Zeddemore

Slavitza Jovan

Character: Gozer

David Margulies

Character: Mayor

Steven Tash

Character: Male Student

Jennifer Runyon

Character: Female Student

Michael Ensign

Character: Hotel Manager

Alice Drummond

Character: Librarian

Jordan Charney

Character: Dean Yager

Timothy Carhart

Character: Violinist

John Rothman

Character: Library Administrator

Tom McDermott

Character: Archbishop

Roger Grimsby

Character: Roger Grimsby

Larry King

Character: Larry King

Joe Franklin

Character: Joe Franklin

Casey Kasem

Character: Casey Kasem (voice)

John Ring

Character: Fire Commissioner

Norman Matlock

Character: Police Commissioner

Joe Cirillo

Character: Police Captain

Joe Schmieg

Character: Police Seargeant

Reginald VelJohnson

Character: Jail Guard

Rhoda Gemignani

Character: Real Estate Woman

Murray Rubin

Character: Man at Elevator

Larry Dilg

Character: Con Edison Man

Danny Stone

Character: Coachman

Patty Freedman

Character: Woman at Party

Jean Kasem

Character: Tall Woman at Party

Lenny Del Genio

Character: Doorman

Frances E. Nealy

Character: Chambermaid

Sam Moses

Character: Hot Dog Vendor

Christopher Wynkoop

Character: TV Reporter

Winston May

Character: Businessman in Cab

Tommy Hollis

Character: Mayor's Aide

Eda Reiss Merin

Character: Louis's Neighbor

Ric Mancini

Character: Policeman at Apartment

Kathryn Janssen

Character: Mrs. Van Hoffman

Stanley Grover

Character: Reporter

Carol Ann Henry

Character: Reporter

James Hardie

Character: Reporter

Frantz Turner

Character: Reporter

Nancy Kelly

Character: Reporter

Paul Trafas

Character: Ted Fleming

Cheryl Birchenfield

Character: Annette Fleming

Ruth Oliver

Character: Library Ghost

Kymberly Herrin

Character: Dream Ghost

Billy Bryan

Character: Stay Puft Marshmallow Man (uncredited)

Frankie Como

Character: T-Shirt Vendor (uncredited)

Peter Costanza

Character: Man Fleeing Marshmallow Man (uncredited)

John De Bello

Character: Patrolman Matthews (uncredited)

Paddi Edwards

Character: Gozer (voice) (uncredited)

Eldo Ray Estes

Character: Redheaded Man (uncredited)

Brute Force

Character: Hare Krishna acolyte (uncredited)

Debbie Gibson

Character: Birthday Girl in Tavern on the Green (uncredited)

Willow Hale

Character: Student at Columbia University (uncredited)

Jon Hayden

Character: Library Patron (uncredited)

Ron Jeremy

Character: Man Behind Barricade (uncredited)

Joseph Marzano

Character: Man in Taxi (uncredited)

Joe Medjuck

Character: Man at Library (uncredited)

Danny Nero

Character: Reporter (uncredited)

Frank Patton III

Character: City Hall Cop (uncredited)

Harrison Ray

Character: Terror Dog (uncredited)

Ivan Reitman

Character: Zuul / Slimer (voice) (uncredited)

Frank Rivers

Character: Prisoner (uncredited)

Mario Todisco

Character: Prisoner (uncredited)

Bill Walton

Character: Bill Walton (uncredited)

Mark Bryan Wilson

Character: Slimer (uncredited)

George Sasaki

Character: Hotel Guest (uncredited)