Sydney Sweeney Gains 16kg, Transforms Body for New Role

Sydney Sweeney’s Intense 34-Pound Transformation for Christy Martin Biopic

To accurately portray Christy Martin in her upcoming biopic, Sydney Sweeney gained approximately 34 pounds and undertook a rigorous daily training schedule of weightlifting and kickboxing for nearly four months. This transformation required Sweeney to buy new clothes, reflecting her dedication to capturing Martin’s boxing prowess. Sweeney stated that she felt a strong responsibility to authentically portray Martin’s story. In preparing for the role, she drew inspiration from sources ranging from actress Kim Novak to the television series Euphoria. Beyond Martin’s boxing career, the film explores aspects of her personal life, including her experiences with domestic violence. Sweeney emphasized that the film highlights themes of resilience, struggle, and triumph over adversity. Christy is scheduled for release in theaters on November 7, 2025.