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Michael Keaton
Johnny Dangerously
Joe Piscopo
Vermin
Marilu Henner
Lil
Peter Boyle
Dundee
Griffin Dunne
Tommy
Glynnis O'Connor
Sally
Dom DeLuise
The Pope
Richard Dimitri
Maroni
Danny DeVito
Burr
Ron Carey
Pat
Ray Walston
Vendor
Dick Butkus
Arthur
Byron Thames
Young Johnny
Sudie Bond
Cleaning Lady
Alan Hale Jr.
Desk Sergeant
Scott Thomson
Charley
Carl Gottlieb
Dr. Magnus
Neal Israel
Dr. Zillman
Mark Jantzen
Dutch
Hal Riddle
Warden
Mike Bacarella
Vito
Gary Watkins
Manny
Hank Garrett
Mayor
Leonard Termo
Tony Scarano
Troy Slaten
Young Tommy
Alexander Hertzberg
Boy in Suit
Georg Olden
Young Vermin
Cynthia Szigeti
Mrs. Capone
Elizabeth Arlen
Girl on Steps
Doris Grossman
Woman
Richard Warwick
Prisoner
Mike Finneran
Prisoner
Paul B. Brice
Prisoner
Will Seltzer
Prisoner
Dick Balduzzi
Prisoner
Gordon Zimmerman
Prisoner
Katie La Bourdette
Blond Girl
Norman Steinberg
Reporter Duffy
Frank Slaten
Henchman
Dean R. Miller
Photographer
Edward C. Short
Porter
Shelley Pogoda
Woman
Jerome Michaels
Reporter Diering
Russell Forte
Hood
Jack Nance
Priest
Joy Michael
Chorus Girl
Rick Rosenthal
Judge
Paula Dell
Mrs. Zimmer
Harvey Parry
Policeman
Jeffrey Weissman
T-Shirt Vendor
Richard A. Roth
Prisoner Rabbi
Chuck Hicks
Governor
Bob Eubanks
M.C.
Claudia Kim
Girl
Trisha Long
Female Butler
Mert Rich
Man
Vincent Schiavelli
Maroni's Building Planner (uncredited)
Taylor Negron
Delivery Man (uncredited)
Joe Flaherty
Death Row Inmate (uncredited)
Hank Robinson
Policeman (uncredited)
Susan Lanier
Radio Singer (uncredited)
Frank Sivero
Plumber (uncredited)
Tom Willett
Theater Patron (uncredited)
Camera
David M. Walsh
Director of Photography
Costume & Make-Up
Patricia Norris
Costume Design
Directing
Amy Heckerling
Director
Editing
Pembroke J. Herring
Editor
Production
Jane Feinberg
Casting
Marci Liroff
Casting
Mike Fenton
Casting
Michael Hertzberg
Producer
Sound
John Morris
Original Music Composer