Park Jeong-su (born July 1, 1983), known professionally as Leeteuk, is a South Korean singer, songwriter, presenter, radio personality and actor. 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.
Leeteuk was born on July 1, 1983. He has an elder sister, Park In-young, who is a singer and an actress. His father, Park Yong-in, and his mother divorced in 1998. He has spoken about his parents' relationship publicly in several variety shows.
When Leeteuk traveled to Apgujeong-dong for sightseeing in early 2000, he was recommended by a talent scout to audition for SM Entertainment's Starlight Casting System. After several test recordings and performances, he signed with SM Entertainment and became a trainee. That same year, he appeared as an extra in the MBC Korean drama All About Eve, and briefly as a model for Pepsi in 2002. In 2003, he was put into five-member boyband Smile, with future bandmate Donghae and aimed to be a rival group of TVXQ. The project was dropped and they were then put into rotational group Super Junior along with ten other boys. Being older than the other trainees, Leeteuk became the leader of the group.