Sydney Sweeney stars in "Christy," a biopic about boxer Christy Martin, gaining 30 pounds for the role.

Sydney Sweeney stars as Christy Martin in the upcoming biopic "Christy," directed by David Michod. Sweeney underwent a significant physical transformation, gaining 30 pounds, to portray the legendary boxer. The film, which premiered at the Toronto International Film Festival, received critical acclaim for Sweeney's performance and explores Martin's rise to fame and her tumultuous personal life, including her relationship with her abusive husband. "Christy" hits theaters on November 7.