Lee Kwang Soo is a South Korean actor and entertainer. He is actor Song Joong Ki's best friend. He is best known as a cast member of the variety show Running Man. Kwang Soo began his entertainment career as a model in 2007. He made his acting debut in the 2008 sitcom 'Here He Comes', followed by 'High Kick Through the Roof'. He is a former member of the boy band Sweet Sorrow, left the group in 2010 to proceed on his acting career. He is now more commonly known as "Prince of Asia" due to his being mobbed by numerous fans whenever 'Running Man' episodes are filmed in other Asian countries such as Thailand, Hong Kong, China, Macau, and Vietnam. He recently also won the 2013 KBS award for most Promising Star.