2007: subgroup and DJ ^^

In February 2007, Leeteuk was placed in the trot-singing Super Junior-T. A year later, Leeteuk became a member of Super Junior-Happy.

Leeteuk has partner with Eunhyuk as host DJs for KBS Super Junior's Kiss The Radio (aka SUKIRA) since 2006. With the exception of fours months from March to June 2011, where band mate Yesung temporarily replaced Eunhyuk, while he was away on promotional activities for Super Junior-M's third EP Perfection.