The Butterfly Effect
- taona: 2004
- Firenena: Canada, United States of America
- Genre: 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
- tale: Eric Bress, J. Mackye Gruber
- Cast: Ashton Kutcher, Amy Smart, Melora Walters, Elden Henson, William Lee Scott, Eric Stoltz