From 2009, Leeteuk, along with Eunhyuk and Shindong, has been regular guests on SBS's
Strong Heart, where they host special segment, Boom Academy, headed by entertainer Boom.
In October 2009, when Boom enlisted for mandatory military service, Leeteuk took over and the segment's name was temporarily changed to Teukigayo, or Teuk Academy. He is also frequent guest on
Star King, also on SBS, with fellow Super Junior members.
In 2010, Leeteuk became the new MC for MBC Enjoy Today, replacing Big Bang's Seungri who left to focus on the group's new album. He sang with F(x)'s Krystal the song "Glumbing" on MBC Enjoy Today. Leeteuk is also the MC for MBC
Love Chaser alongside Yesung.
In 2011, following Kang Ho Dong's retirement from the entertainment industry, Leeteuk and Boom took over as co-MCs of
Star King. From September to November Leeteuk become a dad in
Hello Baby season 4 with girl group Sistar. Leeteuk also became part of a new couple on MBC reality show
We Got Married with actress Kang Sora as his on-screen wife. As of the 10 April 2012 broadcast, following the change in MCs and the departure of Shindong from
Strong Heart, the show was re-vamped with Leeteuk and Eunhyuk billed as two of the 'six-fixed guests'
Leeteuk has stated he plans to enlisted for his mandatory military service in 2012.