Chow Yun-fat SBS (born 18 May 1955), previously known as Donald Chow, is a Hong Kong actor and filmmaker. In a film career spanning more than forty-five years, Chow has appeared in over 100 television drama series and films. Known for his versatility, encompassing action and melodrama, comedy and historical drama, his accolades include three Hong Kong Film Awards for Best Actor and two Golden Horse Awards for Best Actor.

Chow was propelled to fame by TVB dramas such as The Good, The Bad And The Ugly (1979) and The Bund (1980). His first acclaimed film was the Hong Kong political drama The Story of Woo Viet (1981), in which he played a Vietnamese refugee struggling to reach the United States. He is known for his collaborations with filmmaker John Woo in five Hong Kong action films: A Better Tomorrow (1986), which made Chow a box-office superstar in Asia, A Better Tomorrow II (1987), The Killer (1989), Once a Thief (1991), and Hard Boiled (1992). He also starred in the video game Stranglehold (2007), produced by Woo. Chow also made several popular action films with Hong Kong director Ringo Lam, including City on Fire (1987), Prison on Fire (1987), and Full Contact (1992). Chow is credited for bringing Hong Kong gangster films to world prominence.

His other notable Hong Kong and Chinese films include An Autumn's Tale (1987), God of Gamblers (1989), All About Ah-Long (1989), Curse of the Golden Flower (2006), Let the Bullets Fly (2010), From Vegas to Macau (2014), and Project Gutenberg (2018). Chow made his Hollywood debut in The Replacement Killers (1998). He is also known in the West for The Corruptor (1999), Anna and the King (1999), Crouching Tiger, Hidden Dragon (2000), Bulletproof Monk (2003), and Pirates of the Caribbean: At World's End (2007).