Other Mommy

Other Mommy is a 2026 American supernatural psychological horror film directed by Rob Savage from a screenplay by Nathan Elston, based on the 2024 novel Incidents Around the House by Josh Malerman. The film stars Jessica Chastain as a mother who must do everything to protect her seven-year-old daughter (Arabella Olivia Clark) from a supernatural entity that resembles her. Jay Duplass also stars, as the father, while Dichen Lachman, Arian Moayed, Sean Kaufman, and Karen Allen play supporting roles.

Other Mommy was released theatrically in the United States and Canada by Universal Pictures on October 9, 2026. The film received overwhelmingly negative reviews from critics but grossing $101 million worldwide on a $18–19 million budget, which proved and became financially successful.

Seven-year-old Isabela "Bela" Martin struggles to adjust to a new school and cope with the growing distance between her parents. Her mother, Ursula, is consumed by her corporate career, while her father, Russell "Russ", is an unemployed househusband who spends much of his time caring for Bela. Bela begins encountering a supernatural entity resembling her mother that she calls Other Mommy, which repeatedly asks her to let it into her heart.

One afternoon, Ursula returns home from work unexpectedly while Russ is asleep, ostensibly to have lunch with Bela. Ursula's mannerisms are noticeably stilted, and she eventually asks to be let into Bela's heart, whereupon Bela identifies her as Other Mommy. Russ enters the kitchen when the burning food triggers the smoke alarm and leaves the house in a panic with Bela after seeing Other Mommy contorted unnaturally under the counter.