Sienna Miller is crushing those pesky romance rumors surrounding her and Brad Pitt. On Tuesday, the actress, who stars in Pitt's Plan B Entertainment's The Lost City of Z, told Page Six that there is nothing romantic happening between them. "I'm not going to even dignify it with a response," she told the publication at a Cinema Society screening of her latest film. Rumors began to whirl after the colleagues were spotted reportedly getting cozy while out to dinner, but a source told E! News that news of "serious flirting" was "exaggerated."