Black Bear has announced Ben Foster, Merritt Wever, Katy O’Brian and more have joined Sydney Sweeney in the untitled film about boxer Christy Martin.

Black Bear has unveiled a raft of cast additions to David Michôd's untitled Sydney Sweeney-led biopic about boxing champion Christy Martin, as filming starts. The film tells the true story of Martin,

Some major talent has been added to the Sydney Sweeney-led Christy Martin movie, with Ben Foster and Merritt Wever among those joining.

After a blockbuster rom-com and a gripping psychological horror, Sydney Sweeney is once again changing directions with a hard-hitting boxing biopic. The actress will bring the story of boxing trailblazer Christy Martin,