Billy Wilder The Apartment movie poster.

The Apartment is a 1960 American romantic comedy-drama film directed by Billy Wilder. It stars Jack Lemmon, Shirley MacLaine, and Fred MacMurray. The film follows C.C. Baxter (Lemmon), an office worker who lends out his apartment to his superiors for their extramarital affairs in hopes of climbing the corporate ladder. His plans are complicated when he falls for Fran Kubelik (MacLaine), an elevator operator who is having an affair with his boss (MacMurray).

The Apartment was a critical and commercial triumph, winning five Academy Awards, including Best Picture, Best Director, and Best Original Screenplay. It's celebrated for its sharp wit, poignant exploration of loneliness and ambition, and superb performances, particularly from Lemmon and MacLaine. The film's blend of comedy and drama, along with its insightful commentary on corporate culture and relationships, have made it an enduring classic.