Image Credit: MLB Photos via Getty Images Sydney Sweeney is stepping into the boxing ring for what might be her most physically and emotionally demanding role yet. In Christy, the new biopic that premiered at TIFF, the Emmy-nominated actress portrays legendary boxer Christy Martin. Sweeney committed fully to the role, literally delivering real punches alongside her co-stars. "Every single fight you see, we are actually punching each other. We are going full force," she told Vanity Fair - and yes, she emerged with bruises and concussions to prove it.