Karl Urban and Olivia Thirlby star in the latest action-packed comic-book adaptation, Dredd 3D. We chatted with Olivia and Karl during the Toronto International Film Festival to hear about the positive reception the film's gotten, the military training they received prior to filming, and how they made sure to stay on the same page every day on set. They also filled us in on what it was like working in South Africa. Dredd 3D arrives in theaters today.