
The Butterfly Effect
A trauma‑scarred college student discovers his journal can rewrite his darkest memories, forcing him to race against his own fractured mind to prevent a deadly cycle before time runs out.
“Change one thing. Change everything.”
Synopsis
A young man attempts to access repressed childhood memories. He discovers a method that enables him to travel back in time, inhabiting his younger self's body and altering past events. He soon realizes, however, that each change he makes leads to unforeseen consequences.
Credits
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How many hands made this film
The scale of the collaboration
A crew of 65+ credited
Why a floor?
This is a minimum, not a total. We only count the credits we’ve captured so far, and coverage is uneven — a blockbuster might show a few hundred names while another of the same size shows a couple dozen. The real crews all ran into the thousands. The number here only grows as full credits are enriched — so we frame it as a floor, never a headcount.
Craft leads on file
Edited by Peter AmundsonShot by Matthew F LeonettiScored by Michael SubyDesigned by Douglas Higgins
Box Office
2004 · Box office
💰 Box-office hit — grossed 7.4× its budget
Why 2.5×?
Cinemas keep roughly half of every ticket sold, and a wide release’s marketing often costs about as much again as the film — so a movie needs to gross around 2.5× its production budget just to break even theatrically. It’s a rule of thumb, not the studio’s ledger (home video and streaming come later).
Worldwide gross
$96.8M
US & Canada: $57.9M — 60% of worldwide · International: $38.9M (40%)
Opening weekend: $17.1M — 30% of its US run.
Opening week (7-day): $22.2M — 38% of its US & Canada run.
Peak 2,605 theaters
Full synopsis
Also known as
- Butterfly Effectde
- El efecto mariposaes
- L'Effet papillonfr
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Cast & Crew
65 unique people credited
Top billed cast
Ashton Kutcher
as Evan
Amy Smart
as Kayleigh
Melora Walters
as Andrea
Elden Henson
as Lenny
William Lee Scott
as Tommy
John Patrick Amedori
as Evan at 13
Eric Stoltz
as George Miller
Irina Gorovaia
as Kayleigh at 13
Ethan Suplee
as Thumper
Kevin G Schmidt
as Lenny at 13
Logan Lerman
as Evan Treborn age 7
Jesse James
as Tommy at 13
Supporting cast
42Nathaniel Deveaux
as Dr. Redfield
Kevin Durand
as Carlos
Callum Keith Rennie
as Jason Treborn
Cameron Bright
as Tommy age 7
Lorena Gale
as Mrs. Boswell
Kendall Cross
as Mrs. Kagan
John Tierney
as Priest
Ted Friend
as Anchor
John B Lowe
as Professor Carter
Camille Sullivan
as Cricket
Tara Wilson
as Heidi
Jesse Hutch
as Spencer
Bill Croft
as Boss
Kevan Ohtsji
as Anesthesiologist
Daniel Spink
as Senior Brother
Grant Thompson
as Hunter
Melanie Hall
as Gesela
Jake Kaese
as Lenny at 7
Sarah Widdows
as Kayleigh at 7
Amy Esterle
as Gothic Co-Ed
Jacqueline Stewart
as Gwen
Glenn Richards
as Pinching Customer
Sadie Lawrence
as Mrs. Halpern
Sam Easton
as Theta Chi Pledge
Douglas Arthurs
as Karl
Paul Lazenby
as Rick
June B Wilde
as Waitress
Kimani Ray Smith
as Orderly
Trevor Jones
as Sunnyvale Guard
Colby Chartrand
as Teen Punk
Shelly Schiavoni
as Mrs. Miller
Brandy Kopp
as Kristen
Chapelle Jaffe
as Madame Helga
Scott Swanson
as Obstetrician
David Cook
as Moviegoer
Magda Apanowicz
as Teen Punk Girl
Garry Little
as Wedding Priest
David Dasilma
as Theta Chi Pledge #2 (uncredited)
Stan Edmonds
as Crying Mental Patient (uncredited)
Cameron K Smith
as Theater Patron (uncredited)
J Jackson Kocela
as Evan at 3
Andrew Olcott
as Andrea's New Husband
Directors
2Writers
2Producers
4Other crew
5Parents Guide
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