Dermot Mulroney to Star in 'Insidious: Chapter 3'

Dermot Mulroney
<p><em>August: Osage County </em>actor<strong> Dermot Mulroney </strong>was honored for Ensemble Cast alongside co-star <strong>Julia Roberts.&nbsp;</strong></p>   |   John Shearer/Invision/AP
Leigh Whannell wrote the script and will direct the horror movie.

Dermot Mulroney will star in Insidious: Chapter 3, the latest installment of the popular horror series from Blumhouse.

LIST Hollywood's 100 Favorite Films

Leigh Whannell wrote the script and is directing the movie, which Focus Features plans to release April 3, 2015.

The first two movies starred Patrick Wilson and Rose Byrne as a couple who had to deal with the demonic possession of their son. The movies are among the most profitable ones made in recent years.

The plot for the new movie, which is due to start shooting July 7, is being kept under wraps.

PHOTOS 15 Horror Movies That Offered the Most Bang for the Buck

Jason Blum is producing with  Oren Peli and James Wan. Steven Schneider, Brian Kavanaugh-Jones, Peter Schlessel, Lia Buman, and Entertainment One’s Xavier Marchand are executive producing.

Mulroney recently starred in the short-lived TV show Crisis and appeared in August: Osage County. He is repped by WME.