Robert De Niro

Rupert Pupkin

Jerry Lewis

Jerry Langford

Sandra Bernhard

Masha

Diahnne Déa

Rita Keane

Shelley Hack

Cathy Long

Frederick de Cordova

Bert Thomas

Kim Chan

Jonno

Ed Herlihy

Himself

Lou Brown

Band Leader

Margo Winkler

Receptionist

Ralph Monaco

Raymond Wirtz

Catherine Scorsese

Rupert's Mom (voice)

Cathy Scorsese

Dolores

Loretta Tupper

Stage Door Fan

Whitey Ryan

Stage Door Guard

Marta Heflin

Young Girl

Chuck Low

Man in Chinese Restaurant

Katherine Wallach

Autograph Seeker

Robert Colston

Man at Telephone

Tony Randall

Himself

Jay Julien

Langford's Lawyer

Joe Strummer

Street Scum

Paul Simonon

Street Scum

Ellen Foley

Street Scum

Pearl Harbour

Street Scum

Don Letts

Street Scum

Matt Russo

Cabbie

Thelma Lee

Woman in Telephone Booth

Joyce Brothers

Herself

Bill Minkin

McCabe

George Kapp

Mystery Guest

Victor Borge

Himself

Edgar J. Scherick

Wilson Crockett

Ray Dittrich

Giardello

Richard Dioguardi

Captain Burke

Harry J. Ufland

Langford's Agent

Scotty Bloch

Crockett's Secretary

Tony Devon

Plainclothesman

Peter Fain

Plainclothesman

Gerard Murphy

Plainclothesman

Jimmy Raitt

Stage Manager

Martin Scorsese

TV Director

Charles Scorsese

First Man at Bar

Mardik Martin

Second Man at Bar

Marvin Scott

Newsman (voice)

Jeff David

Announcer (voice)

Mick Jones

Street Scum

Liza Minnelli

Liza Minnelli