Kent Cheng Jak-si is a Hong Kong film and television actor.

Cheng was born in a poor family in Hong Kong.

In the 1980s he changed his focus in acting in films and directing.

Cheng opened a film company in the 1990s, but failed and struggled through financial problems during the late 1990s.

However, Cheng could not gain a leading role, so he decided to turn to ATV in 1997.