Matt Damon, Luciana Barroso
Matt Damon stepped out with wife Luciana Barroso on his arm.
Asked about the biggest challenge he faced during filming, the actor was quick to reply. "Dieting," he said. "I'm not a big fan of that… Neill [Blomkamp, the director] literally showed me a picture of my head superimposed on the body of some 22-year-old MMA guy and I went, 'OK. I know what I have to do.' And then it's just about doing it."