Hero (Chinese: 英雄; pinyin: Yīngxióng) is a 2002 wuxia martial arts film directed, co-written, and produced by Zhang Yimou, and starring Jet Li, Tony Leung Chiu-wai, Maggie Cheung, Zhang Ziyi, Donnie Yen and Chen Daoming. The cinematography was by Christopher Doyle, and the musical score composed by Tan Dun. The film was nominated for an Academy Award for Best Foreign Language Film at the 75th Academy Awards.

The historical background of the film refers to the Warring States Period in ancient China, when China was divided into seven states. In 227–221 BC, the Qin state was about to unify the other six states, assassins from the six states were sent to assassinate the king of Qin. One of the most famous incidents was Jing Ke's attempted assassination of the King of Qin.

Hero was first released in China on 24 October 2002. At that time, it was the most expensive project and one of the highest-grossing motion pictures in China. Miramax acquired American market distribution rights, but delayed the release of the film for nearly two years. Quentin Tarantino eventually convinced Miramax to open the film in American theaters on 27 August 2004.

The film received positive reviews from critics. It became the first Chinese-language movie to top the American box office, where it stayed for two consecutive weeks, and went on to earn $53.7 million in the United States and $177 million worldwide.