Lenny Abrahamson Director Brie Larson Ma Actor Jacob Tremblay Jack Actor Joan Allen Grandma Actor Sean Bridgers Old Nick Actor Tom McCamus Leo Actor William H. Macy Grandpa Actor Megan Park Laura Actor Amanda Brugel Officer Parker Actor Emma Donoghue Screenwriter, Executive Producer Ed Guiney Producer David Gross Producer Andrew Lowe Executive Producer Jesse Shapira Executive Producer Jeff Arkuss Executive Producer David Kosse Executive Producer Rose Garnett Executive Producer Tessa Ross Executive Producer Danny Cohen Cinematographer Nathan Nugent Film Editor Stephen Rennicks Original Music Ethan Tobman Production Design Michelle Lannon Art Director Mary Kirkland Set Decoration Lea Carlson Costume Designer Fiona Weir Casting Robin D. Cook Casting