Justin Timberlake Filming 'Runner Runner'

Hard at work on his latest movie endeavor, Justin Timberlake was spotted making his way around the Puerto Rican set of his latest film, "Runner, Runner" on Monday (June 25).

Justin kept his look casual on the tropical set in a navy button up and khaki trousers as he looked to ignore the shutterbugs while keeping a pretty serious face during filming.