Mass is a 2021 American drama film written and directed by Fran Kranz in his directorial debut. It stars Reed Birney, Ann Dowd, Jason Isaacs, and Martha Plimpton as grieving parents who meet to discuss a tragedy involving their sons. The film had its world premiere at the 2021 Sundance Film Festival on January 30, 2021, and was released on October 8, 2021, by Bleecker Street. At the BAFTA Awards, Dowd received a nomination for Best Actress in a Supporting Role.