Billy Lau Nam-Kwong (Chinese: 樓南光, born 3 April 1954) is a Hong Kong film actor. He is best known for playing the Police Captain in Mr. Vampire (1985), and went on to be cast in similar roles. He has appeared in many comedy and horror films.

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Billy Lau Nam-Kwong is a prolific Hong Kong film actor widely recognized for his comedic and character supporting roles in 1980s and 1990s Hong Kong cinema.
He is best known for playing the police captain in Mr. Vampire and for his memorable performances in Eastern Condors and My Lucky Stars.
He primarily works in Hong Kong action, horror-comedy, and crime films associated with the golden era of Cantonese cinema.