South Korean singer and actor best known as a member of the boy band 2AM, with whom he won a Melon Music Award for Song of the Year for "Can't Let You Go Even If I Die." His first solo single, "You Walking Towards Me," was released in 2011.
He previously played in a band called No Comment.
He has appeared as an actor in such TV dramas as "Dream High 2," "Family" and "Marriage, Not Dating."
His mother works for a renovation company, while his father is a CEO.
He and Jo Kwon are both members of 2AM.