Fat Man and Little Boy
- Tahun: 1989
- Negara: United Kingdom, United States of America
- Genre: Drama, History, War
- Studio: Paramount Pictures, Lightmotive
- Kata kunci: atomic bomb, new mexico, world war ii, atomic bomb test, biography, 1940s, manhattan project
- Pengarah: Roland Joffé
- Pelakon: Paul Newman, Dwight Schultz, Bonnie Bedelia, John Cusack, Laura Dern, Ron Frazier