Gene Kelly as Noel Airman

Natalie Wood as Marjorie Morgenstern

Claire Trevor as Rose Morgenstern

Everett Sloane as Arnold Morgenstern

Martin Milner as Wally Wronkin

Carolyn Jones as Marsha Zelenko

George Tobias as Maxwell Greech

Martin Balsam as Dr. David Harris

Jesse White as Lou Michaelson

Edd Byrnes as Sandy Lamm

Paul Picerni as Philip Berman

Alan Reed as Puddles Podell

Ruta Lee as Imogene Norman

Ed Wynn as Uncle Samson

Beverly Aadland as Dancer (uncredited)

Russell Ash as Harry Morgenstern (uncredited)

Howard Bert as Seth Morgenstern (uncredited)

Leslie Bradley as Blair (uncredited)

Peter Brown as Alec (uncredited)

Boyd Cabeen as Wedding Guest (uncredited)

Walter Clinton as Mr. Zelenko (uncredited)

Robert Cole as Actor in Play (uncredited)

Patricia Denise as Karen (uncredited)

Lester Dorr as Elevator Operator (uncredited)

Dan Dowling as First-Nighter (uncredited)

Shelley Fabares as Seth's Friend (uncredited)

Eddie Foster as Carlos (uncredited)

Gail Ganley as Wally's Friend (uncredited)

Stuart Hall as First-Nighter (uncredited)

Elizabeth Harrower as Miss Kimble (uncredited)

Mike Lally as First-Nighter (uncredited)

Carl M. Leviness as Party Guest (uncredited)

Robert Locke Lorraine as First-Nighter (uncredited)

Faye Michael Nuell as Helen Harris (uncredited)

John Pedrini as Restaurant Patron (uncredited)

Murray Pollack as First-Nighter (uncredited)

José Portugal as Wedding Guest (uncredited)

Paul Power as Restaurant Patron (uncredited)

Fred Rapport as Nate (uncredited)

Guy Raymond as Mr. Klabber (uncredited)

Paul Russell as First-Nighter (uncredited)

Bernard Sell as First-Nighter (uncredited)

Maida Severn as Tonia Zelenko (uncredited)

Harry Seymour as Frank (uncredited)

Reginald Sheffield as Hotel Desk Clerk (uncredited)

Charles Sherlock as First-Nighter (uncredited)

Carl Sklover as Leon Lamm (uncredited)

Robert Strong as Party Guest (uncredited)

Jean Vachon as Mary Lamm (uncredited)

Pierre Watkin as Civil Official (uncredited)

James Westmoreland as Actor in Play (uncredited)