Sammy Sum Chun-hin (born 4 May 1983) is an actor based in Hong Kong.

Sammy Sum speaks fluent Hong Kong Cantonese, Mandarin Chinese, Canadian French and North American English.

He was born in Hong Kong, but at the age of 10 Sum moved to Montreal, Quebec, Canada with his family, where he spent all of his adolescent years until his early 20s.

[1] In 2006, Sum auditioned for TVbeople, a talent casting system hosted by TVB, and was selected to sign a two-year artiste contract with the company along with six other winners.

In 2014, Sum gained recognition with his performance in the crime drama Line Walker, for which he was nominated for Most Improved Male Artiste at the TVB Anniversary Awards.