Leigh Whannell is an Australian writer, director, and actor known for his work in the horror genre. He gained prominence as the co-creator of the "Saw" franchise and went on to write and star in the film "Insidious." Whannell's directorial debut, "Upgrade," was well-received for its innovative take on sci-fi action. He later directed the successful reboot of "The Invisible Man." Whannell is praised for his original storytelling and unique vision in the world of horror cinema.