Hulk is a 2003 American superhero film based on the fictional Marvel Comics character of the same name. It was directed by Ang Lee and written by James Schamus, Michael France, and John Turman, from a story by Schamus. Eric Bana stars as Bruce Banner / Hulk, alongside Jennifer Connelly, Sam Elliott, Josh Lucas, and Nick Nolte. The film explores the origins of Bruce Banner, who after a lab accident involving gamma radiation, finds himself able to turn into a huge green-skinned monster whenever he is emotionally provoked or stressed, while he is pursued by the United States military and comes into a conflict with his biological father, who has his own dark agenda for his son.

Development for the film started as far back as 1990. The film was at one point to be directed by Joe Johnston and then Jonathan Hensleigh. More scripts had been written by Hensleigh, John Turman, Michael France, Zak Penn (who would go on to write The Incredible Hulk), J. J. Abrams, Scott Alexander and Larry Karaszewski, Michael Tolkin, and David Hayter before Ang Lee and James Schamus‘ involvement. Hulk was shot mostly in California, primarily in the San Francisco Bay Area.

It grossed $245 million worldwide, becoming one of the highest-grossing films of 2003. The critical consensus on Rotten Tomatoes calls it an ambitious and stylish film that focuses too much on dialogue at the cost of action. A reboot, titled The Incredible Hulk, was released on June 13, 2008, as the second film in the Marvel Cinematic Universe.