A South Korean actor and singer, born on June 6, 1986, in Seoul, South Korea. He is the lead singer of the boy band SS501. He is best known for his role as Yoon Ji Hoo in the 2009 Korean drama Boys Over Flowers and his role as Baek Seung-jo in the TV series Mischievous Kiss, as well as for Inspiring Generation (2014) and Jangnong (Indian Pink) (2021). He won the Seoul International Drama Award in 2009.