Career

He also appeared in the Patrick Marber play Closer. Um"s popularity increased after he began playing supporting roles in television dramas such as Life Special Investigation Team, Worlds Within, Hero, Dream High, Scent of a Woman and Phantom. He was also the leading actor in Good Job, Good Job and The Virus.

Um played the villain in his first film Manitoba of Vendetta, opposite Kim Myung-minister

This was followed by a role as Lee Ki-cheol, a detective investigating serial murders in horror film Killer Toon, opposite Lee Si-young.