Michael Keaton
Role: Johnny Dangerously
Maureen Stapleton
Role: Mom
Glynnis O'Connor
Role: Sally
Dom DeLuise
Role: The Pope
Richard Dimitri
Role: Maroni
Byron Thames
Role: Young Johnny
Sudie Bond
Role: Cleaning Lady
Alan Hale Jr.
Role: Desk Sergeant
Scott Thomson
Role: Charley
Carl Gottlieb
Role: Dr. Magnus
Neal Israel
Role: Dr. Zillman
Leonard Termo
Role: Tony Scarano
Troy Slaten
Role: Young Tommy
Alexander Hertzberg
Role: Boy in Suit
Georg Olden
Role: Young Vermin
Cynthia Szigeti
Role: Mrs. Capone
Elizabeth Arlen
Role: Girl on Steps
Doris Grossman
Role: Woman
Richard Warwick
Role: Prisoner
Mike Finneran
Role: Prisoner
Paul B. Brice
Role: Prisoner
Will Seltzer
Role: Prisoner
Dick Balduzzi
Role: Prisoner
Gordon Zimmerman
Role: Prisoner
Katie La Bourdette
Role: Blond Girl
Norman Steinberg
Role: Reporter Duffy
Frank Slaten
Role: Henchman
Dean R. Miller
Role: Photographer
Edward C. Short
Role: Porter
Shelley Pogoda
Role: Woman
Jerome Michaels
Role: Reporter Diering
Joy Michael
Role: Chorus Girl
Rick Rosenthal
Role: Judge
Paula Dell
Role: Mrs. Zimmer
Harvey Parry
Role: Policeman
Jeffrey Weissman
Role: T-Shirt Vendor
Richard A. Roth
Role: Prisoner Rabbi
Chuck Hicks
Role: Governor
Trisha Long
Role: Female Butler
Vincent Schiavelli
Role: Maroni's Building Planner (uncredited)
Taylor Negron
Role: Delivery Man (uncredited)
Joe Flaherty
Role: Death Row Inmate (uncredited)
Hank Robinson
Role: Policeman (uncredited)
Susan Lanier
Role: Radio Singer (uncredited)
Frank Sivero
Role: Plumber (uncredited)
Tom Willett
Role: Theater Patron (uncredited)