William Chak (Chinese: 翟威廉; born 29 March 1985) is a Hong Kong actor and presenter who achieved fame through TVB's 2010 Mr. Hong Kong contest.

[1][2] 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 2008, Chak graduated from N-atv's Artiste Training Class.

After his contracted with ATV ended in 2009, Chak stayed in South Korea for a year, and earned a black belt in Taekwondo.