 | Lizzy Caplan als Carol |
 | Antony Starr als Mark |
 | Cleopatra Coleman als Miss Devine |
 | Woody Norman als Peter |
 | Luke Busey als Brian |
 | Aleksandra Dragova als The Girl (Sarah) |
 | Jay Rincon als Principal |
 | Anton Kottas als Timothy |
 | Steffanie Sampson als Brian's Mom |
| Jivko Mihaylov als Kevin (Bunny Mask) |
| Iliyan Nikolov als Lucious (Cat Mask) |
| Aleksander Asparuhov als Sean (Pig Mask) |
| Victoria Velikova als Princess |
 | Kate Nichols als Princess' Mom |
| Leah-Felicity Bay als Katie D. |
| James Robinson als Ryan G. |
| Olivia Sussman als Young Sarah (voice) |
 | Debra Wilson als Monster Sarah (voice) |
| Samuel Bodin | Director |
| Roy Lee | Producer |
| Jon Berg | Producer |
| Seth Rogen | Producer |
| Evan Goldberg | Producer |
| James Weaver | Producer |
| Andrew Childs | Executive Producer |
| Josh Fagen | Executive Producer |
| Kevin Greutert | Editor |
| Richard Riffaud | Editor |
| Connor DiGregorio | Executive Producer |
| Christopher Woodrow | Executive Producer |
| Philip Lozano | Director of Photography |
| Sofia Hultquist | Original Music Composer |
| Kellie Roy | Casting |
| Anne McCarthy | Casting |
| Alan Gilmore | Production Design |
| Ivan Ranghelov | Art Direction |
| Arta Tozzi | Set Decoration |
| Anna Gelinova | Costume Design |
| Ivon Ivanova | Makeup Artist |
| Svetla Krasteva | Hairstylist |
| Dimitrina Stoyanova | Key Hair Stylist |
| Boyka Mladenova | Prosthetic Makeup Artist |
| Petya Evtimova | First Assistant Director |
| Galina Kyuchukova | Second Assistant Director |
| Christopher Landry | First Assistant Director |
| Aliki Nakopoulou | Third Assistant Director |
| Teodora Petrova | Second Second Assistant Director |
| Petko Angelov | Set Dresser |
| Peter Krumov | Set Dresser |
| Yossif Mladenov | Set Designer |
| Nikolai Nikolov | Assistant Art Director |
| Giannis Skafidas | Set Designer |
| Dacho Yotov | Set Dresser |
| Phil Barrie | Sound Re-Recording Mixer |
| Phil Barrie | Supervising Sound Editor |
| Phil Barrie | Sound Designer |
| Ketevan Beruashvili | Foley Editor |
| Rati Chkhetiani | Foley Editor |
| Joel Dougherty | Sound Re-Recording Mixer |
| Emil Evtimov | Sound Mixer |
| Biko Gogaladze | Foley Artist |
| Giorgi Lekishvili | Foley Mixer |
| Alexander Sanikidze | Foley Editor |
| Matt Yocum | Sound Effects Editor |
| Morgan Robbins | Casting Associate |
| Hristo Idakiev | Gaffer |
| Charlie Moreno | Steadicam Operator |
| Slavyan Stoichev | Steadicam Operator |
| Claudia Heinz | Stunt Double |
| Dian Hristov | Stunt Coordinator |
| Dessy Slavova | Stunt Double |
| Camil Adell | VFX Artist |
| James David Hattin | Visual Effects Supervisor |
| Erik T. Jensen | VFX Artist |
| Matthew Noren | Visual Effects Coordinator |
| Nate Smalley | Visual Effects Producer |
| Ivo Jivkov | Special Effects Supervisor |
| Chris Thomas Devlin | Writer |
