Lee Kwang Soo (born July 14, 1985) is a South Korean actor and entertainer. He gained a lot of popularity after joining SBS's Good Sunday popular variety show Running Man. He is well known as the framing master and lately he's being called as Kwangvatar (the mixed of his name Kwangsoo and Avatar). Recently he won the award from SBS Entertainment Awards 2011, for category "SBS Variety New Star Award".