Nicholas Cheung Ka-fai (Chinese: 張家輝; pinyin: Zhāng Jiāhuī; born 2 December 1964) is a Hong Kong actor, singer and director.

He went on to star in the films Beast Stalker (2008), The Stool Pigeon (2010), Nightfall (2012), Unbeatable (2013), The White Storm (2013), Helios (2015), Keeper of Darkness (2015), Line Walker (2016), and Bodies at Rest (2019).

[1] He was formerly a Royal Hong Kong Police officer[2][3] for four years, but he left the job after his request to be transferred to the criminal investigation department was turned down.

His fame was built on Wong Jing's comedy at first, but he has changed his acting style for more sombre roles since 2003.

Cheung met Hong Kong actress Esther Kwan while he was still working at ATV.