Education: Hyundae, Inha University (Theatre and Film) (with Ryeowook)
Family: Father, mother and younger sister (Choi Ji Won).
Religion: Christian
Languages: Korean, Mandarin Chinese and English.
He was born on April 7, 1986, but was certified on February 10, 1987.
Siwon opened a coffee shop called "A Twosome Place".
He plays the drums, once played with Trax in September 2006 in the music program Popular Songs SBS because their drummer had left the band.
He is skilled in Taekwondo and is the youngest in Korea holding the fourth rank in the black belt.
His family owns one of the largest supermarket chains in Seoul
Audi Korea chose Siwon and Ha Jung Woo as official ambassadors of this popular car brand. Siwon was elected as one of the artists of many talents and his great worldwide popularity (a major Hallyu stars). The CEO of Audi Korea said "Both have excellent artistic taste and are smart and stylish, I admire your artistic talents, your images will create a dynamic synergy with the prestige of the Audi brand." Siwon will face Sypder Audi R8 model.
Also known as "Soldier of Light" for his collaboration with the 3rd Wave
Awards
2010 SBS Drama Awards - Best New Actor (Oh! My Lady)
4th Men's Health Cool Guy Awards - Best Cover Magazine
2011 AllKPop Awards - Best Social Network Personality 2011
2012 Mnet 20's Choice Awards - 20′s Social Artist (Nominated)
Dramas
The King of Dramas (SBS,2012)
Fall In Love With You Again (HunanTV, 2012)
Extravagant Challenge (GTV, 2011)
Poseidon (KBS, 2011)
Athena: Goddess of War (KBS, 2010)
Oh! My Lady (SBS, 2010)
Stage of Youth (CCTV2, 2009 → Estrella Invitada, Episodio 12)
Legend Of Hyang Dan (MBC, 2007)
Spring Waltz (KBS, 2006)
18 vs. 29 (KBS, 2005)
Precious Family (KBS2, 2004)
Parent's Approval (KBS)
Charnel Boy (KBS)
Movies
I AM. (2012)
Attack on the Pin-Up Boys (2007)
Battle of Wits (2006)
Charamel Boy(2005)
TV Commercials
Elite
12Plus
Seoul Milk
Pepsi
Black Jacket
12Plus (with Heechul and Yesung )
Reaction - "W" of the SK Telesys brand
12Pluss Miracle
Miracle BB Perfect Powder
SK W Smartphone
Acer
Mamonde
12Plus (with Tiffany )
12Plus (with Donghae )
12 Plus (with Kyuhyun)
Caffe Latte
Mamonde First Energy Serum (with Yuri )
SPAO Vest (with Leeteuk and Eunhyuk )
Mamonde Ultra Repair Cream (with Yuri )
Musical Videos
Dana - "What Is Love"
Zhang Li Yin (ft. Xiah Junsu ) - "Timeless - Part I" (with Han Geng )
Zhang Li Yin (ft. Xiah Junsu ) - "Timeless - Part II" (with Han Geng )
Zhang Li Yin - I Will (withHan Geng )
Zhang Li Yin - "The Left Shore Of Happiness" (with Hangeng )