In her Instagram post, Sweeney shared her admiration for Martin, writing, “Over the past few months, I’ve been immersed in training to bring to life the story of an incredible woman—a true champion who fought battles both inside and outside the ring. Her journey is a testament to resilience, strength, and hope.”

The film’s cast includes Ben Foster as James Martin, along with Merritt Weaver, Katy O’Brien, Ethan Embry, Jess Gabor, Chad L Coleman, and Tony Cavalero. Martin’s impact on the sport was immortalised in 2020 when she was inducted into the International Boxing Hall of Fame as part of its first-ever class to include women.