It was recently announced that Universal teamed up with Blumhouse Productions for a feature film based on Stephen King's Gramma. The movie will officially be titled Mercy and we have new casting news, which includes the addition of The Walking Dead's Chandler Riggs.

According to THR, Joel Courtney (Super 8) and Chandler Riggs (Carl on The Walking Dead) are set to star in Mercy, along with Frances O’Connor, who will be playing their mother. The movie will be directed by Peter Cornwell (The Haunting in Connecticut) from a script written by Matt Greenberg (1408).

Gramma was first published in Weirdbook magazine and was part of 1985′s Skeleton Crew. The story “follows two young boys who go with their single mother to take care of their elderly, senile grandmother named Mercy, only to discover that she’s a witch who made a pact with a dark force many years before.”

Jason Blum’s Blumhouse Productions was recently involved with Paranormal Activity 4, as well as Sinister and The Lords of Salem. They signed a three year first-look deal with Universal who hopes to reproduce the same success that other studios have seen with low budget horror productions.

Source: THR