Donald O'Connor as Buster Keaton

Ann Blyth as Gloria Brent

Rhonda Fleming as Peggy Courtney

Peter Lorre as Kurt Bergner

Larry Keating as Lawrence "Larry" Winters

Jackie Coogan as Elmer Case

Richard Anderson as Tom McAffee

Dave Willock as Joe Keaton

Claire Carleton as Myra Keaton

Larry White as Buster - Age 7

Dan Seymour as Indian Chief

Michael Ross as Assistant Chief

Nan Martin as Edna

Robert Christopher as Nick

Richard Aherne as Franklin

Ralph Dumke as Mr. Jennings

Tim Ryan as Studio Policeman

Joseph Forte as Theatre Manager

Larry Rio as Holt

Constance Cavendish as Wife

Ivan Triesault as Duke Alexander Michael David of Austria

Pamela Jayson as Leading Woman

Keith Richards as Leading Man

Dick Ryan as Susan's Father

Guy Wilkerson as Boarder

Elizabeth Slifer as Mrs. Anderson

Cecil B. DeMille as Cecil B. DeMille

Eric Alden as Director (uncredited)

Richard Alexander as Tough Guy (uncredited)

Bobby Barber as Soda Fountain Customer (uncredited)

Mary Benoit as Hairdresser (uncredited)

John Benson as Gloria's Assistant (uncredited)

Cathy Ann Bisutti as Small Girl (uncredited)

Nick Borgani as Film Crew Member (uncredited)

Robert E. Bragg as Small Boy (uncredited)

Ralph Brooks as Restaurant Diner (uncredited)

Dick Cherney as Audience Member (uncredited)

Edith Clair as Party Guest (uncredited)

Tom Coleman as Audience Member (uncredited)

Anne Cornwall as Mrs. Jennings (uncredited)

Paul De Rolf as Kid (uncredited)

Don Dunning as Slate Boy (uncredited)

Minta Durfee as Boarder (uncredited)

Bobby Faye as Boarder (uncredited)

Mickey Finn as Big Man at Boarding House (uncredited)

Duke Fishman as Film Crew Member (uncredited)

Bess Flowers as Restaurant Diner (uncredited)

George Ford as Restaurant Diner (uncredited)

Rudy Germane as Audience Member (uncredited)

Richard Gilden as Wife's Lover (uncredited)

Sam Harris as Actor in Movie (uncredited)

Len Hendry as Husband / Cab Driver (uncredited)

June Jocelyn as Wardrobe Woman (uncredited)

Jeanne Lafayette as Restaurant Diner (uncredited)

Ethan Laidlaw as Backstage Prop Man (uncredited)

Cherokee Landrum as Thin Man (uncredited)

Carl M. Leviness as Speakeasy Diner (uncredited)

Ben Mantz as Photographer (uncredited)

Billy McCoy as Audience Member (uncredited)

William Meader as Party Guest (uncredited)

Jeanette Miller as Boarder (uncredited)

Pat Moran as Assistant Director (uncredited)

Jody O'Cononr as Party Guest (uncredited)

Alan Paige as Make-Up Man (uncredited)

Joe Ploski as Laughing Man in Audience (uncredited)

Harry 'Snub' Pollard as Audience Member (uncredited)

Victor Romito as Cameraman / Waited (uncredited)

Benny Rubin as Wilkie (uncredited)

Bob Scott as Sound Man (uncredited)

Barry Seltzer as Minor Role (uncredited)

Court Shepard as Assistant Director (uncredited)

Mabel Smaney as Laughing Woman in Audience (uncredited)

Bert Stevens as Party Guest (uncredited)

Emilie Stevens as Maid (uncredited)

James Stone as Proprietor (uncredited)

Brick Sullivan as Speakeasy Doorman (uncredited)

Jack Tesler as Boarder (uncredited)

Arthur Tovey as Party Guest (uncredited)

Max Trumpower as Party Guest (uncredited)

Charles Van as Castle (uncredited)

Edward Wahrman as Cameraman (uncredited)