To help his divorced neighbor claim a substantial inheritance, a family man poses as her husband. The ruse spills over into his career in advertising, and his recent promotion relies on his wholesome and moral appearance.

Jack Lemmon
as Sam Bissel

Romy Schneider
as Janet Lagerlof

Dorothy Provine
as Minerva Bissel

Mike Connors
as Howard Ebbets

Edward Andrews
as Mr. Burke

Louis Nye
as Reinhold Shiffner

Robert Q. Lewis
as Earl

Joyce Jameson
as Hotel Prostitute

Anne Seymour
as Irene

Charles Lane
as Jack Bailey