Ji Sung is a South Korean actor. He was born on 27th February 1977 in Seoul, South Korea. Ji Sung is best known for his roles in the television dramas All In, Save the Last Dance for Me, New Heart, Protect the Boss, Secret Love, Kill Me, Heal Me, Innocent Defendant, Familiar Wife, Doctor John, The Devil Judge and the film My PS Partner.

Kwak Tae-geun’s parents were both educators, and they expected him to also enter the teaching profession. But in his sophomore year in high school, his father bought him a VCR and the first movie he rented was Rain Man. Dustin Hoffman’s acting left such an impression on him that he decided to become an actor, despite his father’s objections. He later studied Theater and Film at Hanyang University.