A Vigilante is a 2018 American crime drama film written and directed by Sarah Daggar-Nickson in her feature directorial debut. Starring Olivia Wilde, Morgan Spector, Kyle Catlett, C.J. Wilson, Tonye Patano, Chuck Cooper, Betsy Aidem and Judy Marte, the film follows Sadie (Wilde), a woman who makes it her life's mission to help victims of domestic violence break free from their abusers.