Other Mommy is not streaming on Netflix, Prime Video, or Peacock when it opens in the United States. The Jessica Chastain horror movie reaches US theaters on Friday, October 9, 2026, with some theaters offering Thursday evening previews on October 8.
That theatrical-only launch is the key answer for viewers searching after seeing the trailer or cast interviews. A streaming release is likely later, but Universal has not announced a confirmed home-release date.
Where can you watch Other Mommy?
The official Universal Pictures page for Other Mommy lists US showtimes beginning around the October 9 theatrical release. Availability depends on the local theater, and formats can include standard 2D, Dolby Cinema, Dolby Atmos, and D-BOX where supported.
There is no day-one streaming option. A current US viewing guide from Decider likewise confirms that the movie is theatrical at launch.
Search results and unofficial countdown pages sometimes label a future service before a studio has announced one. Treat those dates as estimates. Universal distributes the movie, so Peacock is a logical eventual destination in the United States, but “likely” is not the same thing as a scheduled release.
What is Other Mommy about?
The movie adapts Josh Malerman’s 2024 novel Incidents Around the House. Its central character is Bela, an eight-year-old girl who says a supernatural being lives in her closet. She calls it Other Mommy because the entity can take the appearance of her mother, Ursula.
That creates a simple but effective problem: Bela cannot always know whether the person standing in front of her is the parent she trusts or something using a familiar face. The threat reaches beyond a creature in a dark room and turns the family’s relationships into part of the horror.
Jessica Chastain plays both Ursula and the sinister double. Arabella Olivia Clark plays Bela, with Jay Duplass, Dichen Lachman, Arian Moayed, and Karen Allen in supporting roles. Rob Savage directs, while James Wan produces through Atomic Monster alongside Blumhouse.
Is it connected to Coraline or Mama?
No. The phrase “Other Mother” is strongly associated with Neil Gaiman’s Coraline, but Other Mommy is a separate story based on Malerman’s novel. The similar parental-doppelgänger idea does not place the two movies in the same universe.
It is also unrelated to Mama, the 2013 supernatural horror film that also starred Chastain. The shared actor and maternal horror themes make the comparison understandable, but the characters and story are different.
Why the child’s point of view matters
The premise works because the audience receives much of the threat through Bela’s limited understanding. Adults may dismiss what sounds like a childhood fear, while the viewer has to decide when her description should be taken literally.
That perspective separates the film from a standard haunted-house setup. The monster does not only attack the family. It exploits doubt inside the family, including the uncomfortable possibility that believing Bela could be dangerous and ignoring her could be worse.
That uncertainty makes the home feel unsafe even before the creature appears directly on screen.
The approach also distinguishes this release from Prime Video’s new Carrie series, which updates school cruelty for the social-media era. Both use a young character’s fear, but one centers on a deceptive presence inside the home and the other on isolation at home and school.
When could Other Mommy reach streaming?
Universal has not published an exact streaming date. Recent studio films often become available for digital rental or purchase before joining a subscription service, but windows vary by box-office performance and distribution decisions.
The safest answer is to watch in theaters now or wait for an official Universal announcement. Peacock may eventually carry the movie in the US, but any specific date currently circulating should be treated as an estimate.
Horror fans looking for another modern reinvention can read our preview of 28 Years Later. For Other Mommy, however, the immediate answer remains straightforward: theaters first, streaming later.