Kristen Stewart (Abby), Mackenzie Davis (Harper), Alison Brie (Sloane), Aubrey Plaza (Riley Johnson), Dan Levy (John), Mary Holland (Jane), Victor Garber (Ted) more..., Mary Steenburgen (Tipper), Ana Gasteyer (Harry Levin), Jake McDorman (Connor), Burl Moseley (Eric), Sarayu Blue (Carolyn McCoy), Caroline Harris (Kelly), Jenny Gulley (Ashley), Dominique Allen Lawson (Levi), Michelle Buteau (Trudy), Carla Gallo (Angry Homeowner Lady), Timothy Simons (Mall Security Ed), Lauren Lapkus (Mall Security Crystal), Jinkx Monsoon (Em. K. Ultra), BenDeLaCreme (Miss L'Teau), Anis N'Dobe (Magnus), Asiyih N'Dobe (Matilda), Sean Michael Weber (Barista), Sarab Kamoo (Striking Woman Jeweler), Chelsea Banglesdorf (Colleen the Hostess), Liron Blumenthal (Fancy Restaurant Waitress), Daryn Kahn (Todd, Bearded Guy), Matt Newell (Guard Eugene), Dave Maulbeck (Book Buyer), Don Hewitt Jr. (Hand Holder Man), Christopher Jon Gombos (Huge Man), Daina Griffith (Caroler), Daniel Krell (Caroler), Dominique Briggs (Caroler), Jonathan Berry (Caroler), Gina Jun (Christmas Party Guest (uncredited)), Daniel Johnson (Barista Chef (uncredited))

Wyck Godfrey (Executive Producer), Matt Temple (Supervising Sound Editor), Clea DuVall (Screenplay), Clea DuVall (Story), Marty Bowen (Producer), Keith Seymour (Key Grip), Jonathan McCoy (Executive Producer) more..., Jonathan McCoy (Unit Production Manager), George Simpson (Production Sound Mixer), Doug Coleman (Stunt Coordinator), Helena Barrett (Stunts), Rich Delia (Casting), Frédéric Dubois (Sound Effects Editor), John Guleserian (Director of Photography), Kimberly Amacker (Key Makeup Artist), Kelly Richardson (Stunts), Chris Ruppenthal (Assistant Location Manager), Darcie Buterbaugh (Key Costumer), Donna M. Belajac (Local Casting), Randy Wilson (Foley Mixer), Brice Liesveld (Visual Effects Producer), James Pastorius (Visual Effects Supervisor), Deb Adair (Sound Re-Recording Mixer), Stefan Fraticelli (Foley Artist), Lacey Terrell (Still Photographer), Loan Phan (Digital Intermediate Producer), Cynthia E. Thornton (Assistant Editor), Theresa Guleserian (Production Design), Phil Lee (Mix Technician), Ian Mclaughlin (Stunts), Mary Holland (Screenplay), Melissa Bretherton (Editor), Stacey Panepinto (Makeup Department Head), Season Kent (Music Supervisor), Erica Weis (Music Editor), Isaac Klausner (Producer), Anthony Cargioli (Boom Operator), Richard E. Chapla Jr. (Unit Production Manager), Amie Doherty (Original Music Composer), Amie Doherty (Orchestrator) and others.