The Apartment is a 1960 American romantic comedy-drama film directed and produced by Billy Wilder from a screenplay he co-wrote with I. A. L. Diamond. It stars Jack Lemmon, Shirley MacLaine, Fred MacMurray, Ray Walston, Jack Kruschen, David Lewis, Willard Waterman, David White, Hope Holiday and Edie Adams.
C.C. "Bud" Baxter is a lonely office drudge at an insurance corporation in New York City. To climb the corporate ladder, he allows four company managers to take turns borrowing his Upper West Side apartment, 51 West 67th Street, for their extramarital affairs. Baxter meticulously juggles the "booking" schedule, but the steady stream of women convinces his neighbors that he is a playboy.