Gallen Lo Ka-leung () is a Hong Kong actor and singer who primarily acts in television series. He is sometimes credited as King Gallen or Law Ka-leung.
Lo started his television career in 1984 at ATV. He received short-term success in acting ATV and singing theme songs for some ATV series. Lo left ATV for rival TVB, but his career did not bloom until 1996, when he was cast in the series Old Time Buddy in 1997 and Secret of the Heart in 1998. Lo won TVB's Best Actor Award three times (1997, 1998, 2002).
In 2003, Lo left TVB and started to focusing on acting and making commercials in Mainland China.
On 24 February 2021, Lo has finished another drama shooting in Mainland China and shared on his Weibo commemorating the completion of his 100th TV series in his career.
Lo married Clare Fong Man-yee, a woman with whom he worked in a non-acting role at TVB, in 1998. Their son was born in 1999. The couple divorced in 2008.
On 30 January 2009, he was engaged to mainland actress (Sophie) Su Yan in Beijing, and had registered his marriage with Su Yan on 9 September 2009. Their daughter was born in 2013.
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