Which film director and screenwriter, André Berthomieu or Derek Yee, was formally an actor?
Derek Yee Derek Yee Tung-sing (), born in 1957, is a former Shaw Brothers actor from Hong Kong, currently a film director and screenwriter, who has achieved fame and respect in Hong Kong and international film festival circuits for treading carefully commercial viability concerns with artistic integrity. He is the younger half-brother of the Hong Kong actors Paul Chun and David Chiang, the latter is also a former Shaw Brothers star.
Mat Yeung Mat Yeung Ming (born 27 February 1981) is a Hong Kong television actor best known for his roles as Lui Ting in "Screen Play" (2000), as Wan Po-yu in "The 'W' Files" (2003), as Tin Hoi in "Be Home for Dinner" (2011), and as Senior Inspector Jasper Kong in "Master of Play" (2012).