Leigh Whannell (born 17 January 1977) is an Australian screenwriter, producer, director and actor. He is best known for writing films directed by his friend
James Wan, including
Saw (2004),
Dead Silence (2007),
Death Sentence (2007),
Insidious (2011) and (2013). Whannell made his directorial debut on , which was released in 2015.