As soon as he finished shooting the 2007 period film "Hwang Jin-yi" about a Joseon-era gisaeng, Yoo chose to act in the play "Come to the Ghost House". A graduate of Dankook University with a major in Theater and Film, he also established a theater to put on one play a year. Almost all the money for the theatrical productions comes from his own wallet. "I work on stage because it's there that I find the challenge and the stimulus an actor needs through continuous creative work," he said.