Tsui Hark (Chinese: 徐克, Vietnamese: Từ Khắc, born 15 February 1950), born Tsui Man-kong, is a Hong Kong film director, producer and screenwriter. Tsui has directed several influential Hong Kong films such as Zu Warriors from the Magic Mountain (1983), the Once Upon a Time in China film series (1991–1997) and The Blade (1995). He is viewed as a major figure in the Golden Age of Hong Kong cinema and is regarded by critics as "one of the masters of Asian cinematography".

In the late 1990s, Tsui had a short-lived career in the United States, directing the Jean-Claude Van Damme–led films Double Team (1997) and Knock Off (1998). Both films were commercially unsuccessful and critically panned; Tsui himself was unsatisfied with his lack of creative control and returned to Hong Kong to continue his career, where he found commercial and critical success with blockbusters such as the Detective Dee film series, Flying Swords of Dragon Gate (2011), and The Taking of Tiger Mountain (2014).