Sammy Sum Chun-hin (born 4 May 1983) is a Hong Kong actor. 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. Before acting in dramas, Sum joined TVB's acting classes and graduated from TVB's 22nd Artiste Training Class of 2007.