Jo Jin Woong is the stage name of Jo Won Joon, a South Korean actor. Born on March 3, 1976, he made his acting debut in theater before appearing in the 2004 film “Once Upon a Time in High School.” He has enjoyed a prolific career in both films and television since then and is best known for his roles in the films “Deep Rooted Tree” (2011), “Nameless Gangster: Rules of the Time” (2012), “A Hard Day” (2014) and the television series “Signal” (2016).