Director: Ashley Cahill
Cast: Mabel Thomas, Neeley Dayan, Shane Graham, Alison Gold, Alex J. Joseph
There is currently no official confirmation of a film titled "Once Upon a Time in a Horror Movie" scheduled for release in 2026. While the web contains references to a 2026 project called "Once Upon a Time in a Cinema" starring Calam Lynch, and various other 2026 releases such as the sci-fi thriller "Project Hail Mary" and the monster movie "Python Boauna," none match the specific horror genre or title provided in your request. Consequently, no verified plot summary, cast list, or production details exist for this specific title at this time.
As this film has not been officially announced or produced, there are no streaming services, rental platforms, or theatrical venues offering tickets for "Once Upon a Time in a Horror Movie (2026)." Please check back after an official studio announcement.