Ben Foster, Merritt Wever, Ethan Embry and Katy O'Brian join Sydney Sweeney in the Christy Martin boxing biopic

Emmy nominee Ben Foster (“Hell or High Water,” “The Survivor”), Emmy winner Merritt Wever (“Nurse Jackie,” “Unbelievable”), Katy O’Brian (“Love Lies Bleeding,” “Twisters”) , Ethan Embry (“Sweet Home Alabama,” “Grace and Frankie”), Jess Gabor (“Shameless,” “Three Women”) and Chad L….