Steve Martin as Arthur

Bernadette Peters as Eileen

Jessica Harper as Joan

Vernel Bagneris as The Accordion Man

John McMartin as Mr. Warner

John Karlen as The Detective

Jay Garner as The Banker

Robert Fitch as Al

Tommy Rall as Ed

Eliska Krupka as The Blind Girl

Christopher Walken as Tom

Francis X. McCarthy as The Bartender

Raleigh Bond as Mr. Barrett

Gloria LeRoy as A Prostitute

Nancy Parsons as The Old Whore

Toni Kaye as Tart

Shirley Kirkes Mar as Tart

Jack Fletcher as Elevator Operator

Hunter Watkins as Boy

Arell Blanton as Motorcycle Police

George P. Wilbur as Motorcycle Police

M.C. Gainey as Young Policeman

Mark Campbell as Newsboy

Mark Martinez as Schoolboy

Duke Stroud as Counterman

Joseph G. Medalis as Counterman

Richard Blum as Pool Player

William Frankfather as Pool Player

James Mendenhall as Warden

Jim Boeke as Hangman

Robert Lee Jarvis as Policeman

Luke Andreas as Customer

Will Hare as Father Everson

Joshua Cadman as Jumbo

Paul Valentine as Bar Patron

Bill Richards as Bar Patron

John Craig as Bar Patron

Alton Ruff as Bar Patron / Dancer

Karla J. Franko as Bank Secretary

Robin Hoff as Bank Secretary

Linda Montana as Bank Secretary

Bunney Brooke as Bank Secretary

Twink Caplan as Bank Customer

Lillian D'Honau as Bank Customer

Barbara Nordella as Bank Customer

Dean Taliaferro as Bank Customer

Wayne Storm as Bank Guard

Gene Ross as Bank Teller

Edward J. Heim as Bank Teller

Dave Adams as Bank Teller

Greg Finley as Bank Teller

Paul Michael as Bank Teller

Joe Ross as Bank Teller

Tammy O'Rourke as Dancer (uncredited)