William Chak (born 29 March 1985) is a Hong Kong actor and presenter who achieved fame through TVB's 2010 Mr. Hong Kong contest. He formerly performed under the stage name Chak Fung.When Chak was eighteen, he traveled to Tokyo, Japan as an exchange student and performed as a comedic dancer in the streets to earn tuition money. After winning the 1st runner up at Hong Kong ATV's 2005 Mr. Asia Contest, he returned to Japan to finish his schooling. In 2006, he signed an artiste contract with ATV.