The Apartment (1960)

2h 6m · Directed by Billy Wilder

Starring Jack Lemmon, Shirley MacLaine, Fred MacMurray, Ray Walston, Jack Kruschen

Bud Baxter is a minor clerk in a huge New York insurance company, until he discovers a quick way to climb the corporate ladder. He lends out his apartment to the executives as a place to take their mistresses. Although he often has to deal with the aftermath of their visits, one night he's left with a major problem to solve.