Killing Mary Sue
What It’s About
A corrupt senator arranges for the murder of his biggest liability, his erratic burnout stepdaughter, only for her to unwittingly discover her natural talent as an untouchable killer.
Directed by James Sunshine
Starring Sierra McCormick, Dermot Mulroney, Sean Patrick Flanery, Jason Mewes, Martin Kove
Where to Watch Killing Mary Sue
Killing Mary Sue is currently streaming on Prime Video, YouTube Free, Tubi, Roku Channel, Fawesome, Hoopla, and Kanopy in the United States. Availability last checked November 1, 2026.
Cast & Creators
More About Killing Mary Sue
Release Date
06/13/2025
06/13/2025
Original Language
English
English
Metadata and media information from TMDB.
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