Born in Seoul, South Korea, he moved to the United States in his youth. He rose to fame with roles in the "American Pie" series and as Harold in the "Harold & Kumar" films. Known for his versatility, he broke barriers by portraying Sulu in the "Star Trek" reboot series, becoming one of the few Asian actors to headline a Hollywood franchise. Beyond film, he has made significant TV appearances, including roles in "Selfie" and "The Exorcist," showcasing his range across comedy and drama.