The Lost Weekend
- Tahun: 1945
- Negara: United States of America
- Genre: Drama
- Studio: Paramount Pictures
- Kata kunci: based on novel or book, brother, paranoia, bartender, addiction, alcoholism, flashback, film noir, suicidal, black and white, writer, alcoholic, bats, low self esteem, dishonesty, hopelessness, delirium tremens, lies, devoted girlfriend
- Pengarah: Billy Wilder
- Pelakon: Ray Milland, Jane Wyman, Phillip Terry, Howard Da Silva, Doris Dowling, Frank Faylen