The first glimpse of the film sees Sweeney — known for her long blonde hair — in the ring as the boxer. Her transformation finds her with Martin's classic dark curly locks and toned arms. Sweeney sported a white tank, long shorts with tassels, a mouthguard and red boxing gloves in the photo.

B lack Bear Pictures released the first official image of Sydney Sweeney as legendary boxer Christy Martin for the upcoming biopic "Christy," revealing a dramatic transformation that has left fans stunned.

"My body was completely different," the "Euphoria" actor said after she trained for three and a half months to play the boxing great.