Hal Smith

Man in Santa Claus Suit (uncredited)

Jack Lemmon

C.C. Baxter

Joan Shawlee

Sylvia

Billy Wilder

Director

Shirley MacLaine

Fran Kubelik

Ray Walston

Joe Dobisch

Fred MacMurray

Jeff D. Sheldrake

Hope Holiday

Margie MacDougall

Edie Adams

Miss Olsen

Bill Baldwin

TV Movie Host (uncredited)

David Lewis

Al Kirkeby

Jack Kruschen

Dr. Dreyfuss

Naomi Stevens

Mrs. Mildred Dreyfuss

Johnny Seven

Karl Matuschka

Joyce Jameson

The Blonde

Willard Waterman

Mr. Vanderhoff

David White

Mr. Eichelberger

Dorothy Abbott

Office Worker (uncredited)

Ralph Moratz

Office Worker (uncredited)

Joe Palma

Office Maintenance Man (uncredited)

Benny Burt

Charlie (uncredited)

Lynn Cartwright

Elevator Supervisor with Clicker (uncredited)

Mason Curry

(uncredited)

David Macklin

Messenger (uncredited)

Paul Bradley

Office Worker (uncredited)

I. A. L. Diamond

Writer