The onetime University of Iowa biochemical engineering major isn't a numbskull- he just plays one on TV. "I want to do (acting) as a career, not just for now," says the star of That '70s Show. "I want to be like Tom Cruise from The Outsiders and go on and do amazing movies for a long time." With a plum part in the upcoming drama Reindeer Games, which stars Ben Affleck, he's on his way.