 | Brie Larson als Joy 'Ma' Newsome |
 | Jacob Tremblay als Jack Newsome |
 | Joan Allen als Nancy Newsome |
 | Sean Bridgers als Old Nick |
 | Tom McCamus als Leo |
 | William H. Macy als Robert Newsome |
 | Cas Anvar als Dr. Mittal |
 | Amanda Brugel als Officer Parker |
 | Wendy Crewson als Talk Show Hostess |
 | Joe Pingue als Officer Grabowski |
 | Sandy McMaster als Veteran |
 | Matt Gordon als Doug |
 | Zarrin Darnell-Martin als Attending Doctor |
 | Jee-Yun Lee als News Anchor |
 | Randal Edwards als Lawyer |
 | Justin Mader als FBI Agent |
| Ola Sturik als Reporter #1 |
 | Rodrigo Fernandez-Stoll als Reporter #2 |
| Rory O'Shea als Reporter #3 |
 | Kate Drummond als Neighbour |
 | Jack Fulton als Jack's Friend |
 | Chantelle Chung als Clerk (uncredited) |
| Brad Wietersen als TV Crewman (uncredited) |
 | Graeme Potts als TV Cameraman (uncredited) |
 | Katelyn Wells als Teenage Girl (uncredited) |
 | Celeste Bruno als Heather Noelle (uncredited) |
| Lenny Abrahamson | Director |
| Ed Guiney | Producer |
| Emma Donoghue | Novel |
| Emma Donoghue | Screenplay |
| Ethan Tobman | Production Design |
| Michelle Lannon | Art Direction |
| Danny Cohen | Director of Photography |
| David Gross | Producer |
| Nathan Nugent | Editor |
| Fiona Weir | Casting |
| Robin D. Cook | Casting |
| Lea Carlson | Costume Design |
| Stephen Rennicks | Original Music Composer |
| Andrew Lowe | Executive Producer |
| Emma Donoghue | Executive Producer |
| Jesse Shapira | Executive Producer |
| Jeff Arkuss | Executive Producer |
| Tessa Ross | Executive Producer |
| Rose Garnett | Executive Producer |
| David Kosse | Executive Producer |
| Mary Kirkland | Set Decoration |
| Jean Frenette | Stunt Coordinator |
| Jean-François Lachapelle | Stunt Coordinator |
| Hartley Gorenstein | Production Manager |
| Brie Larson | Songs |
| Hartley Gorenstein | Line Producer |
| Reid A. Dunlop | First Assistant Director |
| Jonathan Pencharz | Production Coordinator |
| Andrew G. Munro | Payroll Accountant |
| Michelle Ramez | First Assistant Accountant |
| Nathan Nugent | Second Unit Director |
| Dino Laurenza | "A" Camera Operator |
| Dino Laurenza | Steadicam Operator |
| Dean Stinchcombe | First Assistant "A" Camera |
| Adam Tupper | Second Assistant "A" Camera |
| Stephan Maia | Second Assistant "B" Camera |
| Jasper Vrakking | Digital Imaging Technician |
| Carolyn Arbuckle | Script Supervisor |
| Ofer Geva | Boom Operator |
| Vladislav Fedorov | Set Designer |
| Sid Armour | Makeup Artist |
| Jenn Gould | Key Hairdresser |
| Stacey Butterworth | Wigmaker |
| Paul Howden | Key Grip |
| George Kerr | Gaffer |
| Jane Rogers | Extras Casting |
| George Kraychyk | Still Photographer |
| Lisa Shamata | Unit Publicist |
| Jim Snell | Transportation Captain |
| Tricia Perrott | Post Production Supervisor |
| Niall Brady | Supervising Sound Editor |
| Steve Fanagan | Sound Designer |
| Caoimhe Doyle | Foley Artist |
| Jean McGrath | Foley Mixer |
| Rob Huckle | Dolby Consultant |
| Adam Davidson | ADR Recordist |
| Devin Doucette | ADR Recordist |
| Steve Fanagan | Sound Re-Recording Mixer |
| Ken Galvin | Sound Re-Recording Mixer |
| Ed Bruce | Visual Effects Supervisor |
| Kenneth Coyne | Visual Effects Producer |
| Gearoid Grant | Conductor |
| Keith Potter | Executive Producer |
| Chantelle Tabrizi | Supervising Producer |
| Stephanie Chalmers | Set Decoration Buyer |
| Jason McQuarrie | Assistant Art Director |
| Emer O'Shea | Production Executive |
