The film stars Mason Thames, Madeleine McGraw, Jeremy Davies, and Ethan Hawke reprising their roles, with Demián Bichir joining the cast.
In June 2022, Scott Derrickson said that while Joe Hill was protective of his story, the author had pitched him a "wonderful idea" for a sequel that he was open to directing if the first film was a success.
[4] In November 2023, it was reported that Ethan Hawke, Mason Thames, Madeleine McGraw, Jeremy Davies, and Miguel Cazarez Mora would reprise their roles from the first film.
The script was written by Scott Derrickson and C. Robert Cargill, with the duo also serving as producers on the sequel.
[1] With the working title of Mysterium, principal photography began in Toronto on November 4, 2024, and was set to conclude on January 15, 2025.