India, June 10 -- American actor Sydney Sweeney opened up about her physical transformation for her upcoming role as boxer Christy Martin in the biopic based on the bocer's life. In an interview with W Magazine, Sydney shared the extent of her transformation, revealing that she gained over 30 pounds to mirror Martin's toned figure.

"I came onboard to play Christy, and I had about three and a half months of training," the 27-year-old actor explained, detailing her rigorous daily routine of weight training and kickboxing. "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," she added.

The intense training regimen led to a dramatic change ...