Based on a short story called Gramma, it's not the first time this story has been adapted. Originally, the tale of two boys who discover their grandmother is a witch, was turned into an episode of The New Twilight Zone in 1986. Now it's being turned into a big screen horror with Frances O'Connor (A.I.), Mark Duplass (Safety Not Guaranteed), Dylan McDermott (American Horror Story) taking on grown up duties while Joel Courtney ( Super 8 ) and Chandler Riggs ( The Walking Dead ) playing the kids.
http://www.shortlist.com/entertainment/ ... ut-in-2014