Focus and Blumhouse productions announced today that filming has begun on "Insidious: Chapter 3" with stars Dermot Mulroney, Stefanie Scott and Angus Sampson. This is the third installment of the franchise, with the first two films grossing a combined $258 million worldwide. "Insidious: Chapter 3" will be released May 29, 2015 against the recently re-dated untitled Cameron Crowe film and Paramount’s "Monster Trucks".