Yoo Gun

Jo Jeong-ik (born 21 January 1983), better known by his stage name Yoo Gun, is an American-born South Korean actor.
Early life.
Jo Jeong-ik was born in Arizona, United States to Korean American parents. He came to South Korea in the 1990s as a teenager. He is a first cousin of coloratura soprano Sumi Jo.
Career.
Under the stage name Yoo Gun, he began his entertainment career in 1997 as a singer in South Korean boy band Oppa. Yoo rose to popularity through his first leading role in the 2006 television drama "Hello, God!" (); he played a mentally challenged character based on "Charlie" in the novel "Flowers for Algernon". Supporting roles followed in the comedy films "Dasepo Naughty Girls", "Project Makeover", "", and "My Mighty Princess". Yoo underwent six months of martial arts training for his next leading role in the action drama "Fight", which aired on cable in 2008. Besides appearing in the TV series "Bad Couple", "Can't Stop Now", and "Prosecutor Princess", he also made his theater debut in 2010 in the stage play "Thief's Diary".
In 2011, he renounced his U.S. citizenship in order to serve in the South Korean army. Yoo enlisted as an ordinary soldier in March 2011, and was later transferred to the Defense Media Agency in October 2011, where he took over as DJ of the military radio program "This is Friends FM Yoo Gun". He also appeared on the KFN (Korean Forces Network) TV program "March" in 2012.
After his discharge in December 2012, Yoo quickly resumed his career, appearing on the travel program "The World is Delicious" () in an episode about Brazil, followed by a cameo on the melodrama "That Winter, the Wind Blows". Yoo then headlined the KBS1 daily drama "Sincerity Moves Heaven" in 2013.