Jeong-su Park, known professionally as Leeteuk, is a South Korean singer, songwriter, presenter and radio personality. At the age of sixteen, he was discovered by SM Entertainment and became a trainee at SM Entertainment's Starlight Academy. After five years of training, he debuted as a member of boy group Super Junior in November 2005 and since then, he also further participated in the agency's projects Super Junior-T and Super Junior-H.