Sydney Sweeney says her "boobs got bigger" and "butt got huge" as she looks unrecognisable in a new film about boxing icon Christy Martin's astonishing life and her ex-husband's murder attempt Christy Martin and Sydney Sweeney at a premiere for the film Christy in Hollywood (Image: Frazer Harrison, Getty Images)

Sydney Sweeney takes on the role of boxing icon Christy Martin in a new biopic about the fighter's astonishing life and near-death experience at the hands of her ex-husband.

The movie, released in the UK today, (Friday, November 28), sees the Hollywood superstar play the ring legend, who once held the WBC super welterweight title, fought on a Mike Tyson undercard and was the first female boxer to grace the cover of Sports Illustrated.

Known as 'The Coal Miner's Daughte

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