Sung Dong-il (born April 27, 1967) is a South Korean actor. Sung made his acting debut in theater in 1987, then was recruited at the 1991 SBS open talent auditions. He rose to fame as the comic, Jeolla dialect-speaking character "Red Socks" in the television drama Eun-shil, though he later tried to fight typecasting by playing the son of a chaebol tycoon in Love In 3 Colors and a university professor in March.