Choi Siwon (born February 10, 1987 ), also credited as Siwon, is a Korean pop singer and actor. He is a member of the large boy band Super Junior and is part of its subgroup, Super Junior-M. Siwon is best known for his role in the 2006 Hong Kong historical action film A Battle of Wits as the young prince, Liang Shi. He is also one of the first four Korean artists to be on Chinese postage staEarly life Siwon was born and raised in a strict Protestant family in Seoul, South Korea. He has a younger sister, Choi Jiwon. His family owns one of Korea's largest supermarkt chains in Seoul.