Sydney Sweeney: I'm inspired by Christy Martin Sydney Sweeney has revealed her admiration for Christy Martin, the former professional boxer. 4 September 2025 Sydney Sweeney feels inspired by Christy Martin. Sydney Sweeney plays the boxer in her new movie The 27-year-old actress plays the real-life boxer in her new movie Christy, and Sydney has admitted to feeling inspired by the former professional sportswoman.