Choi Si-won (born April 7, 1986), also known as Siwon, is a South Korean singer, actor, and philanthropist, best known as a member of the K-pop group Super Junior, which debuted under SM Entertainment in 2005. He gained fame for hit songs like Sorry, Sorry and Mr. Simple, and has also appeared in popular dramas such as She Was Pretty (2015) and My Fellow Citizens (2019), showcasing his versatility as an entertainer.
Beyond his music and acting career, Siwon is recognized for his philanthropic efforts, serving as a UNICEF ambassador, and maintaining a strong global presence. His dedication, talent, and positive influence have earned him a loyal international fanbase and respect in the entertainment industry.