Jack Lemmon as Howard Brubaker

Catherine Deneuve as Catherine Gunther

Peter Lawford as Ted Gunther

Jack Weston as Potter Shrader

Myrna Loy as Grace Greenlaw

Charles Boyer as Andre Greenlaw

Kenneth Mars as Les Hopkins

Melinda Dillon as Leslie Hopkins

Harvey Korman as Matt Benson

Sally Kellerman as Phyllis Brubaker

Gary Dubin as Stanley Brubaker

Janice Carroll as Mimsy Shrader

Dee Gardner as Naomi Jackson

David Doyle as Orlow P. Walters

Susan Barrett as Singer

Tani Guthrie as Bess Bluestone

Nancy Howard as Connie Archer

Tom Ahearne as Doorman

Don Ames as Train Passenger (uncredited)

Poupée Bocar as Party Guest (uncredited)

Marlys Burdette as Safari Club Waitress (uncredited)

Yvonne D'Angers as Safari Club Waitress (uncredited)

Kathryn Janssen as Party Guest (uncredited)

Sharon Johnson as Safari Club Waitress (uncredited)

Chester Jones as Bartender (uncredited)

Kenner G. Kemp as Train Passenger (uncredited)

Sherry Lansing as Party Guest (uncredited)

Esther Ying Lee as Waitress (uncredited)

Todd Mason as Bar Patron (uncredited)

Arlene Parness as Dancer (uncredited)

Murray Pollack as Party Guest (uncredited)

Frank Raiter as Party Guest (uncredited)

Tony Regan as Party Guest (uncredited)

Felix Silla as Waiter at Safari Club (uncredited)

Owen Song as Waiter (uncredited)

Lisa Todd as Safari Club Waitress (uncredited)