Park Jeong-su (born July 1, 1983), known professionally as Leeteuk (IPA: [itʰɯk̚]), is a South Korean singer, songwriter, presenter, radio personality and actor. He debuted as the leader of the boy band Super Junior in November 2005 and since then has participated in its subgroups Super Junior-T and Super Junior-H. He began his career as a television presenter on the music show M! Countdown. He is best known for his role in presenting Strong Heart, Star King, The Best Cooking Secrets, I Can See Your Voice, and Idol Star Athletics Championships.