Leigh Whannell (/ˈli ˈwɑːnɛl/; born 17 January 1977) is an Australian filmmaker and actor. He has written multiple films that were directed by his friend James Wan, including Saw (2004), Dead Silence (2007), Insidious (2010), and Insidious: Chapter 2 (2013). Whannell made his directorial debut with Insidious: Chapter 3 (2015) and has since directed three more films, Upgrade (2018), The Invisible Man (2020) and Wolf Man (2025).