Jung Jinyoung 정진영 is a South Korean actor He has starred in numerous films including Hi Dharma Bunt and The Case of Itaewon Homicide But Jung is best known for his frequent collaborations with director Lee Joonik namely Once Upon a Time in a Battlefield and its sequel Battlefield Heroes The Happy Life Sunny and particularly for his role as King Yeonsan in the hugely successful King and the Clown