Washington DC, Nov. 11 -- Actor Sydney Sweeney shared how she gained roughly 30 pounds to portray real-life boxer Christy Martin in her new movie, 'Christy', and it included a diet heavily made up of fast food, according to E! News.

In the sports drama, the 'Euphoria' star portrays trailblazing boxer Christy Martin, who, in November 2010, was left for dead by her abusive then-husband, James "Jim" Martin, after he stabbed and shot her inside their home.

In two photos shared to her Instagram Story, Sydney wore two different costumes, a military uniform and a blue oversized T-shirt and jeans, while on the set of the drama. In one of the snaps, she's eating an entire pizza herself, while in the other, she's enjoying a personal order from a ...