Based on the book 'The Watchers' by A.M. Shine.
Originally titled as 'The Watchers', it was later changed to 'The Watched' in the UK and Ireland to avoid confusion with the Netflix series 'The Watcher'.
Ishana Shyamalan's directorial debut in a feature movie. She also directed some episodes of the series Servant.
Mina and her sister Lucy appear to have been named after the best friends from Bram Stoker's Dracula.
This is the first film from New Line to debut the 2024 New Line Cinema logo with the fanfare.