Alan Mak Siu-fai (born 1 January 1965), is a Hong Kong writer, director, actor and producer.In 1986, Mak studied at the School of Drama in the Hong Kong Academy for Performing Arts. Upon graduation in 1990, he started his movie career.Mak made his directorial debut in 1997, with his first film being Nude Fear, which was written and produced by Joe Ma. After that, Mak directed further films such as Rave Fever, A War Named Desire, Final Romance and Stolen Love, which would be his first collaboration with writer Felix Chong. In 2002, Mak and Chong wrote their first script together. The movie was Infernal Affairs, which was produced by Mak's directing partner, Andrew Lau, who also served as cinematographer. Lau and Mak also served as directors for the film, and it would be the first of many collaborations involving the directing duo. Infernal Affairs starred the four top actors of its year—Andy Lau, Tony Leung Chiu-Wai, Eric Tsang and Anthony Wong—along with the year's two top actresses—Kelly Chen and Sammi Cheng. Infernal Affairs was the number one box-office hit in Hong Kong that year, breaking several box office records alone. Furthermore, the film won many Hong Kong Film Awards, including Best Picture, Best Directors (Lau and Mak), Best Screenplay (Mak and co-writer Chong), and Best Supporting Actor (Wong). Infernal Affairs also went on win awards at the 40th Golden Horse Awards and the Golden Bauhinia Awards.

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