Ji Sung is a South Korean actor. In 1999, he made his acting debut in the romantic drama "KAIST". In 2003, his performance in the romantic drama "All In" won him the Excellence Award in the SBS Drama Awards. In March 2004, he starred in the weekend drama "Terms of Endearment" and became the champion of the 2004 South Korean television series ratings. In October, he starred in the weekend drama "Save the Last Dance for Me". In 2009, he starred in the romantic drama "Swallow the Sun". In 2011, his role in the romantic comedy television series "Protect the Boss" won him the Top Excellence Award for an Actor in the SBS Drama Awards. In 2012, he starred in the comedy film "Whatcha Wearin'?", which racked up over 1.83 million ticket sales. In 2013, he starred in the romantic drama "Secret Love" and won the Top Excellence Award for an Actor, the Best Couple Award, and the Popularity Award in the KBS Drama Awards. In the same year, he tied the knot with actress Lee Bo-Young. In 2014, he starred in the crime film "Confession". In January 2015, he starred in the romantic drama "Kill Me, Heal Me" and won the Grand Prize in the MBC Drama Awards and the Best Performer award in the 28th Korea PD Awards. In April 2016, he starred in the inspirational drama "Entertainer". In January 2017, he starred in the suspense drama "Innocent Defendant".