Jo In Sung (born July 28, 1981) is a South Korean actor. He attended school in Seoul, then went to college first at Chunnam Science College and later at Dongguk University, where he majored in performing arts. However, he was dismissed by faculties because of lacking class attendance.
He firstly debuted as fashion model of Ziozia. Jo is one of the most popular actors featuring great deal of ads in South Korea.