The 18th Academy Awards were held on March 7, 1946, at Grauman's Chinese Theatre to honor the films of 1945. Being the first Oscars after the end of World War II, the ceremony returned to the glamour of the prewar years; notably, the plaster statuettes that had been used during the war were replaced by bronze statuettes with gold plating and an elevated base.

The Lost Weekend is a 1945 American drama film noir directed by Billy Wilder, and starring Ray Milland and Jane Wyman. It was based on Charles R. Jackson's 1944 novel of the same name about an alcoholic writer. The film was nominated for seven Academy Awards and won four: Best Picture, Best Director, Best Actor, and Best Adapted Screenplay. It also shared the Grand Prix at the first Cannes Film Festival, making it one of only three films—the other two being Marty (1955) and Parasite (2019)—to win both the Academy Award for Best Picture and the highest award at Cannes.