Joon is a member of the Korean group MBLAQ. He was an actor for commercials before he joined the group. He had a small role in the Korean sitcom "That person is coming". In 2009 Joon also appeared in "Ninja Assassin" as the teenage Raizo. He then became a part of the boy band MBLAQ. In 2010, he has been cast in two dramas, titled "Jungle Fish 2", in...