SI WON ( choi si won )

· Full Name: 최시원 / Choi Si Won (pronounced: Choy Shi Won)
· Nickname: Simba
· Birthdate: 1987-Feb-10
· Profession: Actor, Singer, Model
· Education: Hyun Dae High School / Inha University (Physical Education Arts Department)
· Height: 190cm
· Weight: 62kg
· Blood Type:O
· Girlfriend: Annie Guo

Choi was discovered through the Starlight Casting System in 2003 and soon joined under the agency of SM Entertainment where he was trained in areas of singing, acting, and dancing. He made his first appearance in a music video of The Grace's DANA when she was still a solo singer in 2003. A year after, Siwon made a brief appearance in the short drama, Precious Family. In early 2005 Choi's talent agency released an announcement that Choi would officially debut as a member of the large all-boy K-pop group, Super Junior, which was slated to make an official debut near the end of the year.

On November 6, 2005, Choi officially debuted on SBS's Inkigayo with the reason of Super Junior, performing the group's first single "TWINS (Knock Out)."

Choi is one of the few members of Super Junior who actively appears on variety shows. Choi makes frequent appearances on Love Letter and other popular South Korean variety programs. Choi is also a popular symbol for endorsements, being an endorser of many items in South Korea. In early March 2007 he has been picked up as the presenter of Thailand's 12 Plus Powder and went to Thailand several times a year to shoot the commercial.

Although initially trained to be a singer, Choi has made many appearances in dramas. He made his first official drama appearance on KBS's 18 vs. 29 (열여덟 스물아홉) in 2005, playing the role of young Kang Bo-nam. He later joined the cast for the Korean drama mini-series Spring Waltz (봄의 왈츠 ) in 2006. Siwon's first lead role was in the short drama, Legend of Hyang Dang (향단전), released on September 2007

Choi was chosen to be part of the epic film A Battle of Wits with Hong Kong actor and singer Andy Lau. A Battle of Wits is a big budget film with joint collaboration from South Korea, China, and Japan, and was released in China and Hong Kong on November 23, 2006. The film was released in Korea in early 2007. Choi has promoted the movie in China with a short tour of four cities at the end of November.[1] Choi also received praises from co-star Lau, stating that Choi is a wonderful actor and is a good example that can be set for young Hong Kong idols.

Starting 2008 Choi will be starring in another Korean language film, "Sun Jung Man Hwa", with Yoo Ji-tae, Lee Yeon Hee, and Chae Jung An. Choi will depict as a high school student who falls in love with Chae Jung An, a woman much older than he