Kung Fu Hustle (Chinese: 功夫; lit. 'Kung Fu') is a 2004 martial arts action comedy film directed, produced and co-written by Stephen Chow, who also stars in the leading role, alongside Huang Shengyi, Yuen Wah, Yuen Qiu, Danny Chan Kwok-kwan and Leung Siu-lung in prominent roles. The story revolves around a murderous neighbourhood gang, a poor village with unlikely heroes and an aspiring gangster's fierce journey to find his true self. The martial arts choreography is supervised by Yuen Woo-ping.

The film was a co-production between Hong Kong and Mainland Chinese companies, filmed in Shanghai. After the commercial success of Shaolin Soccer, its production company, Star Overseas, began to develop the films with Columbia Pictures Asia in 2002. It features a number of retired actors famous for 1970s Hong Kong action cinema and has been compared to contemporary and influential wuxia films such as Crouching Tiger, Hidden Dragon and Hero. The cartoon special effects in the film, accompanied by traditional Chinese music, are often cited as its most striking feature.

Kung Fu Hustle was released on 23 December 2004 in China and on 25 January 2005 in the United States. The film received positive reviews and grossed US$17 million in North America and US$84 million in other regions. It was tenth on the list of highest-grossing foreign-language films in the United States as well as the highest-grossing foreign-language film in the country in 2005. Kung Fu Hustle won numerous awards, including six Hong Kong Film Awards and five Golden Horse Awards. The film was re-released in 3D in October 2014 across Asia and North America, marking the tenth anniversary of the film.