The Lost Weekend
- Jier: 1945
- Lân: United States of America
- Sjenre: Drama
- Studio: Paramount Pictures
- Keyword: based on novel or book, alcohol, 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
- Direkteur: Billy Wilder
- Cast: Ray Milland, Jane Wyman, Phillip Terry, Howard Da Silva, Doris Dowling, Frank Faylen