Good Neighbor Sam (1964) is a classic American comedy starring Jack Lemmon, Romy Schneider, and Dorothy Provine. The story follows a cheerful advertising man whose quiet family life becomes complicated when he agrees to help a friend by posing as her husband. What starts as a simple favor quickly turns into a series of humorous misunderstandings and lively situations. With sharp performances, witty dialogue, and lighthearted charm, this film is a fun example of 1960s Hollywood comedy.