Sydney Sweeney Details Gaining 30 Lbs. for Christy Martin Biopic

Sydney Sweeney is feeling euphoric about her body transformation.
In fact, the actress said she "loved" gaining more than 30 pounds to play boxing legend Christy Martin in an upcoming biopic directed by David Michôd.
“I came onboard to play Christy, and I had about three and a half months of training," she told W magazine in an interview published June 7. "I started eating. I weight-trained in the morning for an hour, kickboxed midday for about two hours, and then weight-trained again at night for an hour."
As a result of her new routine, Sydney said her body became "completely different."
"I didn't fit in any of my clothes," she continued. "I’m usually a size 23 in jeans, and I was wearing a size 27. My boobs got bigger. And my butt got huge. It was crazy!"
The 27-year-old added with a laugh, "But it was amazing: I was so strong, like crazy strong."
Indeed, it takes a strong woman to play Christy. After all, she survived a near-fatal attack in 2010 by her then-husband James "Jim" Martin. (Jim died in 2024 while serving his prison sentence for the attempted murder.)
"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," Sydney wrote on Instagram in October. "Her journey is a testament to resilience, strength, and hope, and I'm honored to step into her shoes to share her powerful story with you all."
Alongside her note, the Euphoria star shared photos of herself dressed as Christy, 56, on the set of the sports movie. Clad in a brunette wig and red sleeveless top, Sydney proudly flexed her bicep to show off her new muscles.
"Christy's story isn't a light one, it's physically and emotionally demanding, there's a lot of weight to carry," she told Deadline last year. "But I love challenging myself. Christy Martin not only legitimized female boxing, she overcame gender stereotypes and fought through emotional, physical and financial abuse."
For more stars who've gained or lost weight for their roles, keep reading...
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