Most of the crew believed that the basement was haunted. The basement was actually an abandoned old morgue.
A lot of scenes were cut from the final movie and some of them ended up in the DVD.
The actor that plays Jimmy got his nose broken for real during the fight with the Strange Man.
St. Agatha was filmed in 20 days in Madison and Rutledge (GA).
Worldwide debut was held at The Overlook Film Festival in New Orleans.