Leigh Whannell is an Australian filmmaker and actor. He is best known for writing films 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 two more films, Upgrade (2018) and The Invisible Man (2020).

James Wan is an Australian filmmaker. He has primarily worked in the horror genre as the co-creator of the Saw and Insidious franchises and the creator of The Conjuring Universe. The lattermost is the highest-grossing horror franchise at over $2 billion. Wan is also the founder of film and television production company Atomic Monster.