As the countdown to graduation begins, students at Osborne High are being stalked by a maniac intent on exposing their darkest secrets to the entire town, terrorizing victims while wearing a life-like mask of their own face. With a mysterious past of her own, Makani and her friends must discover the killer's identity before they become victims themselves.
You can now watch There's Someone Inside Your House online on the following streaming providers in the United States.
| Writing | Henry Gayden | Screenplay |
| Writing | Stephanie Perkins | Novel |
| Production | Dan Cohen | Producer |
| Production | Michael Clear | Producer |
| Production | Shawn Levy | Producer |
| Production | James Wan | Producer |
| Directing | Patrick Brice | Director |
| Production | Emily Morris | Executive Producer |
| Production | Judson Scott | Executive Producer |
| Production | Brendan Ferguson | Executive Producer |
| Production | James Bitonti | Associate Producer |
| Camera | Jeff Cutter | Director of Photography |
| Production | Rich Delia | Casting |
| Sound | Zachary Dawes | Music |
| Editing | Michel Aller | Editor |
| Production | Rich Delia | Casting Director |
| Art | William Arnold | Production Design |
| Art | Eli Best | Art Direction |
| Art | Rachel Robinson | Set Decoration |
| Costume & Make-Up | Rosalina Da Silva | Makeup Department Head |
| Sound | Jeffrey A. Pitts | Sound Designer |
| Visual Effects | David Crawford | Visual Effects Supervisor |
| Costume & Make-Up | Jori Woodman | Costume Design |
| Sound | Andy Hay | Sound Re-Recording Mixer |
| Sound | Andy Hay | Supervising Sound Editor |
| Sound | Gabriel J. Serrano | Sound Re-Recording Mixer |
| Costume & Make-Up | Jeannie Chow | Hair Department Head |
| Production | Brendan Ferguson | Unit Production Manager |
| Production | Adam Folk | Executive In Charge Of Production |
| Production | Nicole Oguchi | Production Manager |
| Directing | James Bitonti | First Assistant Director |
| Directing | Benjamin Cairns | Second Assistant Director |
| Directing | Ronald Hersey | Second Unit Director |
| Directing | Jonathan MacPherson | Second Unit Director |
| Directing | David Scott Thomson | Third Assistant Director |
| Art | Kevin Cockell | Assistant Property Master |
| Art | Kate Farnan | Props |
| Costume & Make-Up | Matthew Gorman | On Set Dresser |
| Art | Mike Lilley | Graphic Designer |
| Art | Rohan Lyal | Head Greensman |
| Art | Stephanie Seidle | Set Buyer |
| Art | Ronnie Werneburg | Construction Coordinator |
| Sound | Michael Baird | Dialogue Editor |
| Sound | Paul Timothy Carden | Dialogue Editor |
| Sound | Caleb Hollenback | Sound Recordist |
| Sound | Michael Miller | ADR Mixer |
| Sound | Chris Navarro | ADR Mixer |
| Sound | Karina Rezhevska | Foley Mixer |
| Crew | Paul Benjamin | Special Effects Coordinator |
| Crew | Colton Friesen | Special Effects |
| Crew | Vishal Chauhan | Compositor |
| Visual Effects | Yuting Chen | Digital Compositor |
| Visual Effects | Jason Colthrust | Visual Effects |
| Crew | Jody Fedele | Visual Effects Editor |
| Crew | Utkarsh Gupta | Compositor |
| Visual Effects | Jonathan MacPherson | Visual Effects Supervisor |
| Visual Effects | Maria Mira | Visual Effects Producer |
| Visual Effects | Kapil Prajapati | Digital Compositor |
| Visual Effects | Pratik Redkar | VFX Artist |
| Visual Effects | Jose Andres Romero | Digital Compositor |
| Visual Effects | Sarika Salian | Compositing Lead |
| Visual Effects | Aude Vitrant | Visual Effects Producer |
| Visual Effects | Katherina Walpulski | Visual Effects Coordinator |
| Visual Effects | Cleiton Wiggers Werncke | Digital Compositor |
| Crew | Adiam Haddish Asrat | Stunt Double |
| Crew | Kirstyn König | Stunt Double |
| Crew | Donavin Kuhl | Stunt Double |
| Crew | Maya Macatumpag | Stunt Double |
| Crew | Marie Marolle | Stunt Double |
| Crew | Rochelle Okoye | Stunt Double |
| Crew | Dan Shea | Stunt Coordinator |
| Lighting | Stephen Arnott | Key Rigging Grip |
| Camera | Sergii Bogomolov | Camera Trainee |
| Camera | David Bukach | Still Photographer |
| Lighting | Clyde Harrelson | Lighting Technician |
| Lighting | James M. Jackson | Gaffer |
| Lighting | Daniel Pierce | Rigging Grip |
| Camera | Leon Serginson | Best Boy Grip |
| Camera | Troy James Sobotka | Key Grip |
| Production | Susan Boyajian | ADR Voice Casting |
| Production | Mark Droter | Casting Associate |
| Production | Sandra-Ken Freeman | Extras Casting |
| Production | Katherine McCown | Casting Assistant |
| Production | Alicia Scott | Extras Casting |
| Production | Stephanie Townsend | Casting Assistant |
| Costume & Make-Up | Sara Byblow | Assistant Costume Designer |
| Costume & Make-Up | Paula Negritto | Costume Supervisor |
| Art | Prince Justin Atkinson | Location Scout |
| Production | Michael Farias | Location Manager |
| Sound | Carla Azar | Musician |
| Sound | Jay Bellerose | Musician |
| Sound | Greg Edwards | Musician |
| Sound | Jody Friedman | Music Coordinator |
| Sound | Maggie Phillips | Music Supervisor |
| Crew | Djordjije Nikolic | Driver |
| Crew | Julia Stiles | Thanks |
| Art | Aaron Becker | Main Title Designer |
| Production | Terri Garbutt | Production Coordinator |
| Production | Alex Kokke | Production Assistant |
| Production | Sonja Olafsdottir | First Assistant Production Coordinator |
| Sound | Sharon Van Etten | Musician |
| Sound | Jamie Stewart | Musician |
| Visual Effects | Brooke Lyndon-Stanford | Visual Effects Supervisor |
| Production | Henry Gayden | Co-Producer |
| Production | Nicole Shizuka Oguchi | Production Manager |
| Crew | Lauralee Connery | Stunt Coordinator |
| Art | Kacey McDougall | Assistant Art Director |
| Art | Jen Swanston | Assistant Set Decoration |
| Directing | Ana Oparnica Sebal | Script Supervisor |
| Sound | Mark Noda | Sound Mixer |
| Costume & Make-Up | Madison Mah | Assistant Makeup Artist |
| Costume & Make-Up | Megan Harkness | Assistant Makeup Artist |
| Costume & Make-Up | Megan Lyons | Assistant Makeup Artist |
| Costume & Make-Up | Toby Lindola | Special Effects Makeup Artist |
| Crew | Daphne Lambrinou | Post Production Supervisor |
| Editing | Nicholas Monsour | Additional Editor |
| Visual Effects | Jimmy Uddo | Visual Effects Producer |
| Crew | Nick Sena | Additional Music |
| Camera | Brian Pearson | Second Unit Director of Photography |
| Camera | Tobias A. Schliessler | Second Unit Director of Photography |
| Visual Effects | Jay Randall | Visual Effects Supervisor |
| Visual Effects | Marie-Josee Paradis | Visual Effects Producer |
| Visual Effects | Justin Cornish | Visual Effects Supervisor |
| Crew | Ali Dunn | Stunts |
| Art | Jonathan Peter Fill | Set Dresser |
| Crew | Cassandra Ebner | Stunts |
| Crew | Janene Carleton | Stunt Double |
