The Butterfly Effect
- Jier: 2004
- Lân: Canada, United States of America
- Sjenre: Science Fiction, Thriller
- Studio: FilmEngine, Katalyst Films, BenderSpink, New Line Cinema
- Keyword: prison, mind control, child abuse, amnesia, chaos theory, blackout, trauma, diary, time travel, flashback, bully, love, memory loss, psychiatrist, therapy, childhood
- Direkteur: Eric Bress, J. Mackye Gruber
- Cast: Ashton Kutcher, Amy Smart, Melora Walters, Elden Henson, William Lee Scott, Eric Stoltz