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