Jonathan Levine Director, Screenwriter Joseph Gordon-Levitt Ethan Actor Seth Rogen Isaac Actor, Producer Anthony Mackie Chris Actor Jillian Bell Betsy Actor Lizzy Caplan Diana Actor Heléne Yorke Cindy Actor Michael Shannon Mr. Green Actor Mindy Kaling Sarah Actor Ilana Glazer Rebecca Grinch Actor Aaron Hill Tommy Owens Actor Tracy Morgan Narrator, Santa Actor Darrie Lawrence Nana Actor Nathan Fielder Joshua Actor James Franco Self Miley Cyrus Self Kamal Angelo Bolden Kamal Actor Baron Davis Self Lorraine Toussaint Mrs. Roberts Actor Randall Park Boss Actor Kyle Hunter Screenwriter, Executive Producer Ariel Shaffir Screenwriter, Executive Producer Evan Goldberg Screenwriter, Producer Nathan Kahane Executive Producer Joseph Drake Executive Producer Barbara A. Hall Executive Producer Ben Waisbren Executive Producer James Weaver Producer Brandon Trost Cinematographer Zene Baker Film Editing Marco Beltrami Original Music Miles Hankins Original Music Annie Spitz Production Design Chris Shriver Art Director Chryss Hionis Set Decoration Melissa Toth Costume Design