Robert De Niro
Rupert Pupkin
Jerry Lewis
Jerry Langford
Frederick de Cordova
Bert Thomas
Margo Winkler
Receptionist
Ralph Monaco
Raymond Wirtz
Catherine Scorsese
Rupert's Mom (voice)
Loretta Tupper
Stage Door Fan
Peter Potulski
Stage Door Fan
Vinnie Gonzales
Stage Door Fan
Whitey Ryan
Stage Door Guard
Chuck Low
Man in Chinese Restaurant
Katherine Wallach
Autograph Seeker
Charles Kaleina
Autograph Seeker
Richard Baratz
Caricaturist
Leslie Levinson
Roberta Posner
Alan Potashnick
Man at Telephone
Michael Kolba
Man at Telephone
Robert Colston
Man at Telephone
Ramon Rodriguez
Man at Telephone
Chuck Coop
Man at Telephone
Sel Vitella
Man at Telephone
Tony Boschetti
Mr. Gangemi
Jay Julien
Langford's Lawyer
Jerry Baxter-Worman
Street Scum
Thelma Lee
Woman in Telephone Booth
Rob-Jamere Wess
Security Guard
Edgar J. Scherick
Wilson Crockett
Richard Dioguardi
Captain Burke
Harry J. Ufland
Langford's Agent
Scotty Bloch
Crockett's Secretary
Diane Rachell
McCabe's Wife
Dennis Mulligan
Plainclothesman
Tony Devon
Plainclothesman
Peter Fain
Plainclothesman
Michael F. Stodden
Plainclothesman
Gerard Murphy
Plainclothesman
Martin Scorsese
TV Director
Charles Scorsese
First Man at Bar
Mardik Martin
Second Man at Bar
William Jorgensen
Newsman (voice)
Marvin Scott
Newsman (voice)
Chuck Stevens
Newsman (voice)
William Littauer
Newsman (voice)
Jeff David
Announcer (voice)
Liza Minnelli
Liza Minnelli