Sydney Sweeney Gains 30 Pounds for Christy Martin Biopic

Sydney Sweeney underwent a significant physical transformation for her role as boxing champion Christy Martin in an upcoming biopic directed by David Michôd. Over three and a half months, she gained more than 30 pounds of muscle through a rigorous training regimen that included weight training and kickboxing, resulting in a body she described as "crazy strong" and notably different from her usual physique. Sweeney's transformation was so dramatic that she could no longer fit into her regular clothes, moving from size 23 to size 27 jeans, with noticeable changes in her body shape. The film chronicles Martin's rise as America's most recognized female boxer in the 1990s and her survival of a brutal murder attempt by her husband in 2010. Filming wrapped in late 2024, with the movie expected to release in late 2025 or early 2026, featuring a supporting cast including Ben Foster as James Martin. Sweeney's commitment to the role has been praised for expanding her acting range beyond her previous work.