Leeteuk, (born on July 1, 1983) a stage name to Park Jungsu, is the oldest member and leader of Super Junior. Ever since their official debut as a group, Leeteuk has been a regular MC for M.NET's M! Countdown along with other Suju members Kang-in and Sindong.
Along with Eunhyuk, Leeteuk is also the DJ for KBS's SUper Junior Kiss the Radio program since August 21, 2006. He later on became the host of his own show, Leeteuk's Love Fighter, a variety show where he helps solves troubled couples' problems.
* He had jokingly mentioned on television that Kim Yu Na (an iceskater) had refused his invitation in Cyworld and had created a huge fuss between Suju and her fans that he had to publicly apologize for his blunder.
* He said that he wants a girlfriend who is innocent, has lots of understanding, wise, has eyes that go half-moon shape when she smiles, skinny, can connect with him well, etc. He gave 10 requirements for his ideal girlfriend.
* He is often seen as the one who is affected the most when it comes to criticism regarding Super Junior as he is their leader. He once bashed critics for their prejudice views on idol groups.