'Insidious Chapter 3' is less than three weeks away from shooting and now actor Dermot Mulroney ('August: Osage County') has been brave enough to join the cast of the third installment in the hugely successful Blumhouse horror franchise. Lin Shaye, Angus Sampson and Leigh Whannell (whom confirmed the casting news on his official Twitter page) will all be reprising their roles from the first two movies and the project will mark writer/actor Leigh Whannell's directorial debut. 17-year old actress Stefanie Scott ('A.N.T. Farm') is also set to star in the horror threequel. James Wan, who helmed the previous chapters, will be on board to co-produce alongside Jason Blum and 'Paranormal Activity's Oren Peli.
'Insidious Chapter 3' begins shooting on 7 July 2014 and is set for a theatrical release on 3 April 2015.