 | Charlize Theron als Libby Day |
 | Nicholas Hoult als Lyle Wirth |
 | Chloë Grace Moretz als Young Diondra Wertzner |
 | Christina Hendricks als Patty Day |
 | Tye Sheridan als Young Ben Day |
 | Corey Stoll als Ben Day |
 | Andrea Roth als Diondra Wertzner |
 | Sterling Jerins als Young Libby Day |
 | Shannon Kook als Young Trey Teepano |
 | Drea de Matteo als Krissi Cates |
 | Sean Bridgers als Runner Day |
 | J. LaRose als Trey Teepano |
 | Jennifer Pierce Mathus als Diane |
 | Denise Williamson als Crystal |
 | Natalie Precht als Michelle Day |
 | Madison McGuire als Debby Day |
 | Addy Miller als Young Krissi Cates |
 | Jeff Chase als Calvin Diehl |
 | Laura Cayouette als Krissi Cates' Mother |
 | Richard Gunn als Lou Cates |
 | Glenn Morshower als Jim Jeffreys |
 | Lori Z. Cordova als Magda |
 | Michael Crabtree als Joseph |
 | John F. Daniel als Bob Berdella |
 | Steve Shearer als Bert Nolan |
 | Dan Hewitt Owens als Robert |
 | Gillian Flynn als Kill Club Goer |
 | Tyler Forrest als Warehouse Guitarist |
 | Dora Madison als Warehouse Girl |
 | Sheri Davis als Bar Patron |
 | Sarah Eilts als Manson Girl |
| Cody Daniel als Mike Allen |
| Lawrence P. Beron als Mr. Gruber |
| Gilles Paquet-Brenner | Director |
| Laura Katz | Music Supervisor |
| Carmen Cuba | Casting |
| Laurence Bennett | Production Design |
| April Napier | Costume Design |
| Gillian Flynn | Novel |
| Azim Bolkiah | Producer |
| Cesar Canavati | Co-Executive Producer |
| Matthias Ehrenberg | Executive Producer |
| Jillian Longnecker | Executive Producer |
| Ricardo Kleinbaum | Executive Producer |
| Ginger Sledge | Executive Producer |
| Nicolas Veinberg | Executive Producer |
| Daniel Turk | Art Direction |
| Douglas Crise | Editor |
| Cathy Schulman | Producer |
| Alexander Yves Brunner | Executive Producer |
| Linda Lee Sutton | Set Decoration |
| Matt Jackson | Producer |
| Stéphane Marsil | Producer |
| Charlize Theron | Producer |
| Joanne Podmore | Associate Producer |
| Barry Ackroyd | Director of Photography |
| Gilles Paquet-Brenner | Screenplay |
| Beth Kono | Producer |
| Wendy Rutland | Co-Executive Producer |
| Tobin Armbrust | Executive Producer |
| José Levy | Executive Producer |
| Peter Safran | Executive Producer |
| Gregory Tripi | Original Music Composer |
| A.J. Dix | Producer |
| Jeff Rice | Executive Producer |
| Matthew Rhodes | Producer |
| Osvaldo Ríos | Executive Producer |
| Rob Weston | Executive Producer |
| Rhian Williams | Associate Producer |
| Billy Fox | Editor |
| Erich Stratmann | Music Editor |
| Carmen Soriano | Script Supervisor |
| Doane Gregory | Still Photographer |
| Jacenda Burkett | Makeup Department Head |
| Lawrnell Bell-Rattler | Key Hair Stylist |
| Gregg Brazzel | Stunt Coordinator |
| Cheryl Wheeler Duncan | Stunt Double |
| Sarah J. Donohue | Production Supervisor |
| Emily Brobst | Stunt Double |
| Chelsea Bruland | Stunt Double |
| Ginger Sledge | Unit Production Manager |
| Vincent Palmo Jr. | First Assistant Director |
| Kathie Tull | Second Assistant Director |
| Julien David | Additional Dialogue |
| Rachel Parker | Additional Dialogue |
| Julien David | Adaptation |
| Rachel Parker | Adaptation |
