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Killing Mary Sue is an American action film written and directed by James Sunshine and produced by Jonathan Sachar, Larry Layfield, Patrick Durham, and Dave Lugo. It stars Sierra McCormick, Dermot Mulroney, Sean Patrick Flanery, Jason Mewes, Jake Busey, Martin Kove, French Stewart, Kym Whitley, and Jesse Kove. The film features a corrupt senator who arranges for the murder of his biggest liability, his erratic burnout step-daughter, only for her to unwittingly discover her natural talent as an untouchable killer.