Best known as a member of a popular K-pop group called Super Junior, this vocalist and disc jockey also had a career as a stage actor, starring in such musical productions as Hong Gil Dong and Spamalot.
In 2014, he joined an S.M. Entertainment singing group called S.M. The Ballad.
He and Lee Sungmin both performed with Super Junior.
At the age of fifteen, he won a talent contest known as the Cheonan Singing Competition and subsequently became a member of S.M. Entertainment's training program.
Born Kim Jong-woon, he grew up in South Korea's South Chungcheong Province as the older of two children.