John Cho is a Korean American actor best known as playing Harold in the Harold and Kumar film series, as well as playing helmsman Hikaru Sulu in 2009's Star Trek.
When Tony Stark and Bruce Banner try to jump-start a dormant peacekeeping program called Ultron, things go horribly wrong and it's up to Earth's mightiest heroes to stop the villainous Ultron from enacting his terrible plan.
