There's Someone Inside Your House is a 2021 American slasher film written by Henry Gayden and directed by Patrick Brice. It is an adaptation of the 2017 novel of the same name by Stephanie Perkins and stars Sydney Park, Théodore Pellerin, Asjha Cooper, Jesse LaTourette, and Diego Josef. The plot follows Makani Young (Park), a senior transfer student from Hawaii who later finds herself in the center of gruesome murder cases in her newly acquainted town of Osborne, Nebraska.

There's Someone Inside Your House was announced in March 2018, with Netflix announcing Shawn Levy and James Wan would produce through their respective production banners Atomic Monster and 21 Laps. Principal photography took place the following year in Vancouver with cinematographer Jeff Cutter; additional filming concluded in August 2020. During post-production, editing was completed by Michel Aller and the musical score was composed by Zachary Dawes.

There's Someone Inside Your House premiered at Fantastic Fest on September 23, 2021, and was released on Netflix on October 6.