The Sorrows of Young Werther
Um Ki-joon made his acting debut in 1995 in the stage play "Richard III", though he later became best known as a musical theatre actor, starring in "Singin' in the Rain", "The Sorrows of Young Werther", "Grease", "The Three Musketeers", "Jack the Ripper", "The Count of Monte Cristo", "Catch Me If You Can", and "Rebecca". He also appeared in the Patrick Marber play "Closer".