Director Renny Harlin simultaneously filmed all three films of this trilogy. His lead actor would film scenes for the first film in the morning and scenes for the second in the afternoon, commuting to many different locations for filming several times a day.
According to Froy Gutierrez, filming of all three films took place in Fall of 2022 over a 52-day shoot.
The film's script was originally 280 pages long based off of notes and ideas which director Renny Harlin and producer Courtney Solomon juggled between each other. They then separated the screenplay into three parts which is now planned to be a trilogy of interlocked stories.
The title suggests that it might be a prequel to the 2008 original, but it isn't. "The Strangers: Chapter 1" is actually the start of a new trilogy, with two subsequent chapters on the way. It is a new trilogy, only inspired by Bertino's original.
The third film of a series and the first film of a new trilogy. All films of the trilogy are directed by Renny Harlin.