Small parts in the 2003 feature films Gigli and Carnival Sun followed, but it wasn't until he played opposite Nicolas Cage in the action flick National Treasure (2004) that Bartha became known to mainstream audiences. In 2006, he made the most of a supporting role in Failure to Launch, and in that same year he landed the lead role on the sitcom "Teachers."
Bartha has also worked behind the camera, writing and directing the short film "Highs and Lows," which screened at the South by Southwest Film Festival in 2003.
Shortly after moving into a new apartment, hedonistic college student Leah meets a drug dealer named Blue, and the two hit it off. But when Blue gets busted, Leah must decide what to do with his enormous stash of cocaine.