Bill Murray (Peter Venkman)
Dan Aykroyd (Raymond Stantz)
Sigourney Weaver (Dana Barrett)
Harold Ramis (Egon Spengler)
Rick Moranis (Louis Tully)
Susan Boehm (Young Woman on Crutches)
Alex Zimmerman (Detective)
George Wilbur (Bailiff)
Chloe Webb (Venkman's Talk Show Guest (uncredited))
Louise Troy (Woman with Fur Coat)
Mary Ellen Trainor (Brownstone Mother)
Ben Stein (Public Works Official)
Douglas Seale (Plaza Hotel Man)
Jason Reitman (Brownstone Boy)
Brian Doyle-Murray (Psychiatrist)
Page Leong (Spengler's Assistant)
Mark Schneider (Arguing Couple)
Bobby Brown (Mayor's Doorman)
Olivia Ward (Meter Maid)
Christopher Villasenor (Brownstone Boy)
Valery Pappas (Arguing Couple)
Sharon Kramer (Stenographer)
Angelo di Mascio (Restaurant Cop)
Yvette Cruise (Maria, Dana's Maid)
Tom Dugan (Restaurant Cop)
Catherine Reitman (Girl with Puppy)
Annie Potts (Janine Melnitz)
Erik Holland (Fire Commissioner)
John Hammil (Detective)
Philip Baker Hall (Police Commissioner)
Ray Glanzmann (Detective)
Richard Foronjy (Con Ed Supervisor)
Dave Florek (1st Cop)
Walter Flanagan (Rudy, the Museum Guard)
Kevin Dunn (Venkman's Talk Show Guest (uncredited))
Robert Ditillio (Spectator)
William T. Deutschendorf (Baby Oscar)
Henry J. Deutschendorf II (Baby Oscar)
Ron Cummins (Police Lieutenant)
Robert Alan Beuth (Store Manager)
Michael P. Moran (Frank, the Doorman)
Mordecai Lawner (Man with a Ticket)
Aaron Lustig (Norman, the Producer)
Peter Papageorgiou (Spectator)
Ralph Monaco (Police Sergeant)
Harris Yulin (Judge)
Kurt Fuller (Hardemeyer)
Janet Margolin (Prosecutor)
Christopher Neame (Maitre d')
Cheech Marin (Dock Supervisor)
Judy Ovitz (Slimed Restaurant Patron)
Ernie Hudson (Winston Zeddmore)
Peter MacNicol (Janosz Poha)
David Margulies (Mayor of New York)
Wilhelm von Homburg (Vigo)