Hulk (also known as The Hulk) is a 2007 American superhero film based on the Marvel Comics character created by Stan Lee and Jack Kirby. The film was directed by Louis Leterrier and written by Zak Penn. Edward Norton stars as Bruce Banner and The Incredible Hulk, alongside Liv Tyler, Harrison Ford, Adrian Pasdar and Jeffrey Dean Morgan. The film explores Bruce Banner's origins. After a lab accident involving gamma radiation, he transforms into a giant green-skinned humanoid with superhuman strength known as the Hulk whenever stressed or emotionally provoked. The United States military pursues him, and he clashes with his biological father.