Sydney Sweeney has undergone a remarkable physical transformation for her role as legendary boxer Christy Martin in the upcoming biopic “Christy.” The 27-year-old actress shared revealing photos on Instagram on July 23, 2025, showcasing her bulked-up physique after gaining 13 kilograms. “I became really strong, incredibly strong,” Sweeney told Entertainment Tonight. She added, “I did wrestling and kickboxing from the age of 12 to 19. I was eager to get back in the ring, to train and transform my body.”
Sweeney’s post, captioned “Her journey is a testament to resilience, strength and hope, and it is an honour for me to step into her shoes and share her powerful story with all of you,” has gone viral. The film is set to premiere at the Toronto International Film Festival in September 2025.
Sweeney immersed herself in training to portray Martin, a pioneer in women’s boxing. “Over the past few months I have been immersed in training to bring to life the story of an incredible woman,” she wrote on Instagram in October 2024. The explicit photos show her toned, muscular build—a stark contrast to her usual roles. Sweeney explained: “Christy Martin’s story is not exactly light; it is physically and mentally demanding, but I love to challenge myself.”
Sydney Sweeney said “I’m Christy Martin now” and meant it 🥊 pic.twitter.com/Lr0DOs9zub
— HYPEBEAST (@HYPEBEAST) July 22, 2025Her process involved rigorous workouts, which helped her gain weight for authenticity. Fans praised her dedication, with comments like “You look powerful!” flooding her post.
Christy Martin’s Tragic Yet Resilient Life
Christy Martin, born in 1968, revolutionised women’s boxing as its first Hall of Famer in 1996. Known as “The Coal Miner’s Daughter,” she had a 49-7-3 record with 31 KOs. However, her life was marred by abuse. In 2010, her husband Jim Martin stabbed and shot her, leaving her for dead. Martin survived and testified against him; he received 25 years for attempted murder.
Martin revealed in Netflix’s “Untold: Deal with the Devil” (2021): “My story is about sexuality. It’s about domestic violence. It’s about child sexual abuse.” She endured childhood sexual abuse, cocaine addiction supplied by Jim, and years of domestic violence. “Blood was gushing out of the holes,” she recalled of the attack.
Sydney Sweeney has opened up about her rigorous training routine and the body transformation she underwent, while filming for lesbian boxing legend Christy Martin’s upcoming biopic. pic.twitter.com/OUVXwZ22il
— PinkNews (@PinkNews) June 11, 2025Martin’s journey of survival inspired Sweeney: “It’s an honour to step into her shoes.”
Directed by an unnamed filmmaker, “Christy” focuses on Martin’s resilience in the face of adversity. Sweeney’s transformation underscores the film’s emphasis on strength. Set for Toronto premiere, it highlights gender violence and triumph.
Fans and critics applaud Sweeney’s commitment, with Entertainment Tonight noting her “granite chin” inspiration from Martin’s ex. This role follows Sweeney’s successes in “Euphoria” and “The White Lotus,” showcasing her range.
