La Garçonnière

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

Hope Holiday

Margie MacDougall

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)

Joe Palma

Office Maintenance Man (uncredited)

Bill Baldwin

TV Movie Host (uncredited)

Benny Burt

Charlie (uncredited)

Lynn Cartwright

Elevator Supervisor with Clicker (uncredited)