Sigourney Weaver Dana Barrett
Annie Potts Janine Melnitz
Ernie Hudson Winston Zeddemore
Bill Murray Dr. Peter Venkman
Dan Aykroyd Dr. Raymond Stantz, Screenplay
Rick Moranis Louis Tully
William Atherton Walter Peck
Harold Ramis Dr. Egon Spengler, Screenplay
Casey Kasem Casey Kasem (voice)
Slavitza Jovan Gozer
Timothy Carhart Violinist
Steve James Stunts
Reginald VelJohnson Jail Guard
Debbie Gibson Birthday Girl in Tavern on the Green (uncredited)
Larry King Larry King
Alice Drummond Librarian
Diane Warren Songs
Ivan Reitman Producer, Zuul / Slimer (voice) (uncredited), Director
Michael Ensign Hotel Manager
Jennifer Runyon Female Student
John Bruno Visual Effects Art Director
David Margulies Mayor
Frantz Turner Reporter
Paddi Edwards Gozer (voice) (uncredited)
Steven Tash Male Student
Tom Morga Stunt Double
Les Fresholtz Sound Re-Recording Mixer
John Rothman Library Administrator
Larry Holt Stunts
Elmer Bernstein Original Music Composer
Eda Reiss Merin Louis's Neighbor
Danny Nero Reporter (uncredited)
Ray Parker, Jr. Theme Song Performance, Songs
Rhoda Gemignani Real Estate Woman
Richard Edlund Visual Effects
Jean Kasem Tall Woman at Party
Tommy Hollis Mayor's Aide
Kathryn Janssen Mrs. Van Hoffman
László Kovács Director of Photography
Kymberly Herrin Dream Ghost
Joe Medjuck Associate Producer, Man at Library (uncredited)
Bill Walton Bill Walton (uncredited)
Bernie Brillstein Executive Producer
Joe Franklin Joe Franklin
Katterli Frauenfelder Second Assistant Director
Frank Rivers Prisoner (uncredited)
Ric Mancini Policeman at Apartment
Jordan Charney Dean Yager
John DeCuir Production Design
Suzy Benzinger Costume Design
Richmond L. Aguilar Gaffer
Mark Bryan Wilson Slimer (uncredited)
Bill Damaschke Producer
Stanley Grover Reporter
John Ring Fire Commissioner
Willow Hale Student at Columbia University (uncredited)
Rick Alexander Sound Re-Recording Mixer
Norman Matlock Police Commissioner
Christopher Wynkoop TV Reporter
Marvin March Set Decoration
Sam Moses Hot Dog Vendor
Murray Rubin Man at Elevator
Patty Freedman Woman at Party
Gene S. Cantamessa Production Sound Mixer
Jim Aupperle Visual Effects Camera
Joseph E. Thibo First Assistant Camera
Joe Cirillo Police Captain
Frank Patton III City Hall Cop (uncredited)
Richard Beggs Sound Designer
Vern Poore Sound Re-Recording Mixer
George Sasaki Hotel Guest (uncredited)
James Hardie Reporter