Cho Jae hyun
Cho Jaehyun is a South Korean film, stage, and TV actor. He is commonly dubbed director Kim Kiduks persona since Cho has starred as leading and supporting characters in almost all films directed by Kim.
Cho Jaehyun was born in Seoul in 1965. He and his family lived in a poor neighborhood on the slopes of a hill until his father became successful with his restaurant business in the Jongno area, Seoul. In a 2002 interview with the film magazine Cine21, Cho said he was a rebellious boy wandering outside the home. He aspired to be a painter, so tried to enter an art high school but failed. When he entered another high school, Cho ran away from home to Busan. Cho worked as a waiter there, and studied on his own to pass a qualification exam equivalent to obtaining a high school diploma. However, Cho failed it, so returned to Seoul to finish his high school year.
Source: Wikipedia