Ji Sung is a popular South Korean actor. Born in February 27, 1977, as Kwak Tae Geun, he adopted the stage name Choi Ji Sung early in his acting career but later dropped the Choi and simply went with Ji Sung. He made his acting debut in the 1999 drama series “KAIST” but it was his role opposite Lee Byung Hun in 2003’s “All In” that made Ji Sung a bona fide star. He has since had many leading roles in films and television dramas, including the popular “Protect the Boss” (2011), “Secret” (2013), “Kill Me, Heal Me” (2015), “Entertainer” (2016) and “Defendant” (2017). In 2013, Ji Sung married popular actress Lee Bo Young, and they are one of the most popular celebrity couples in Korean entertainment.