Jack Lemmon

C.C. Baxter

Shirley MacLaine

Fran Kubelik

Fred MacMurray

Jeff D. Sheldrake

Ray Walston

Joe Dobisch

Jack Kruschen

Dr. Dreyfuss

David Lewis

Al Kirkeby

Joan Shawlee

Sylvia

Naomi Stevens

Mrs. Mildred Dreyfuss

Johnny Seven

Karl Matuschka

Joyce Jameson

The Blonde

Willard Waterman

Mr. Vanderhoff

David White

Mr. Eichelberger

Edie Adams

Miss Olsen

Dorothy Abbott

Office Worker (uncredited)

Ralph Moratz

Office Worker (uncredited)

Bill Baldwin

TV Movie Host (uncredited)

Lynn Cartwright

Elevator Supervisor with Clicker (uncredited)

David Macklin

Messenger (uncredited)

Hal Smith

Man in Santa Claus Suit (uncredited)

Steve Carruthers

Restaurant Patron (uncredited)

Franklyn Farnum

Office Worker (uncredited)

Eugene Jackson

Office Worker (uncredited)

Monty O'Grady

Office Worker (uncredited)