Except, every once in a while, one film proves an exception to the rule. “The Fighter,” David O. Russell’s fictionalized biography of boxer Micky Ward, was a rare worldwide smash in 2010. Ron Howard’s 2005 “Cinderella Man,” about James J. Braddock and starring Russell Crowe, was also a rare critical and commercial success.

Sydney Sweeney is brushing off the abysmal box office numbers for her new movie.