Chow Yun-fat SBS (born 18 May 1955), previously known as Donald Chow, is a Hong Kong actor. He has collaborated with filmmaker John Woo in five Hong Kong action films: A Better Tomorrow (1986), A Better Tomorrow II (1987), The Killer (1989), Once a Thief (1991) and Hard Boiled (1992), and in the West for his roles as King Mongkut in Anna and the King (1999), Li Mu-bai in Crouching Tiger, Hidden Dragon (2000) and Sao Feng in Pirates of the Caribbean: At World's End (2007).

He mainly plays in drama films and has won three Hong Kong Film Awards for Best Actor and two Golden Horse Awards for Best Actor in Taiwan. Chow started his career in movies in 1976 with Goldig Films, the third largest film company at the time.