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)

Norman Matlock

Police Commissioner

Reginald VelJohnson

Jail Guard

Rhoda Gemignani

Real Estate Woman

Murray Rubin

Man at Elevator

Jean Kasem

Tall Woman at Party

Sam Moses

Hot Dog Vendor

Christopher Wynkoop

TV Reporter

Tommy Hollis

Mayor's Aide

Eda Reiss Merin

Louis's Neighbor

Stanley Grover

Reporter

Frantz Turner

Reporter

Kymberly Herrin

Dream Ghost

John De Bello

Patrolman Matthews (uncredited)

Paddi Edwards

Gozer (voice) (uncredited)

Eldo Ray Estes

Redheaded Man (uncredited)

Debbie Gibson

Birthday Girl in Tavern on the Green (uncredited)

Willow Hale

Student at Columbia University (uncredited)

Jon Hayden

Library Patron (uncredited)

Ron Jeremy

Man Behind Barricade (uncredited)

Joe Medjuck

Man at Library (uncredited)

Frank Patton III

City Hall Cop (uncredited)

Ivan Reitman

Zuul / Slimer (voice) (uncredited)

Frank Rivers

Prisoner (uncredited)

Bill Walton

Bill Walton (uncredited)

Mark Bryan Wilson

Slimer (uncredited)