Hyun Sung (현성) is a South Korean actor. He is also known as Kim Hyun-sung (김현성).
More details at TMDB
My Beautiful Days
2002
Knock
2012
Poison Frog
Vegetarian
2010
Night Flight
2014
The Deal
2015
Detective Nam
Teacher
White Night
Do-yoon
Han-gyu
Min-ho
Puzzle
2006
Jung
Resurrection of the Little Match Girl
Ju
Jun-i
Three Friends
1996
Kim Tae-moo
