Insidious Chapter 3 is now in production in Los Angeles, according to Focus Features. Director Leigh Whannell is helming the horror movie, starring Dermot Mulroney (The Grey, August: Osage County), Stefanie Scott, Lin Shaye, Angus Sampson, and the filmmaker himself. Whannell also penned the script for Insidious Chapter 3 and is the co-creator of the scary movie series. Continue reading…