Leigh Whannell (born January 17, 1977) is an Australian screenwriter, producer, director and actor who has primarily worked in the horror genre. He is best known for co-creating the "Saw" and "Insidious" franchises with James Wan.

澳大利亚编剧、制片人、导演和演员，主要从事恐怖类型的工作。他最出名的是与詹姆斯·万（James Wan）共同创作了《电锯惊魂》（Saw）和《阴险》（Insidious）系列。