St. Agatha is a 2018 American horror film directed by Darren Lynn Bousman and starring Sabrina Kern and Carolyn Hennesy.

In 1957, a homeless young pregnant woman named Mary runs away from her abusive father following the accidental death of her younger brother William.

The Wrights, a donor couple, bring her back to the house, where Mother Superior commands her to put her wounded arm in saltwater as punishment.

Sarah, another girl housed in the convent, tells Mary that she believes that the nuns took her healthy baby boy David at birth and told her a lie that he had been stillborn.

The website's consensus reads: "St. Agatha makes admittedly uneven use of its story's well-worn religious tropes, but the overall effect may still be just chilling enough for horror fans.

"[7] Reviewer Karina "ScreamQueen" Adelgaard of heavenofhorror.com gave the film a low rating of 2/5, though she acknowledged that "Carolyn Hennesy is absolutely brilliant as Mother Superior.

"[10] Reviewer Matt Glasby of RadioTimes.com gave the film a taring of 3 out of 5 stars, writing, "shouldn't exploitation cinema be a bit more fun?

"[11] Reviewer John Noonan of horrornews.net wrote, "St Agatha doesn’t promise much at the beginning and manages to lose its way right at the moment when it finally realizes what it wants to do.