A daughter calls out to her mother to check for the monster under the bed. But what happens when the monster is the mother herself? Jessica Chastain returns to the horror genre with Other Mommy, set to hit theatres in October 2026. Directed by Rob Savage, the unsettling drama unravels as a child’s greatest nightmare — her mother turning sinister — comes to life.
If 2026 has proved anything, it’s that the horror genre is thriving. From the unsettling scares of Obsession to the nightmare fuel of Backrooms and the blood-soaked chaos of Evil Dead Burn, the year’s biggest releases have kept fans on the edge of their seats. So it’s only fitting that fans are also excited for Other Mommy.
Based on the New York Times bestselling novel Incidents Around the House by Josh Malerman, the film marks Chastain’s return to the horror genre. She previously starred in Mama (2013), Crimson Peak (2015) and It: Chapter Two (2019). This time, however, she’s pulling double duty by playing a loving mother as well as a sinister, body-twisting entity that is terrorising her daughter.
So, if you are intrigued by its premise, here is everything you need to know about Other Mommy, including its plot, cast, release date and the spine-chilling trailer.
Other Mommy: All about Jessica Chastain’s upcoming horror film
What is the plot of the 2026 movie Other Mommy?
According to its official synopsis, the movie follows eight-year-old Bela, who lives in a home struggling with marital problems. Her world takes an unsettling turn when a sinister entity bearing an uncanny resemblance to her mother emerges from her closet — whom Bela calls “other mommy”. Bela soon finds herself unable to tell the difference between the loving parent she knows and the terrifying entity that has invaded her home.
The cast of Other Mommy
- Jessica Chastain as Bela’s mother/ Other mommy
- Jay Duplass as Daddo, Bela’s father
- Arabella Olivia Clark as Bela
- Dichen Lachman
- Arian Moayed
- Karen Allen
What is the release date of Other Mommy?
Mark your calendars for 9 October 2026, because Other Mommy will arrive in theatres just in time to make your Halloween movie marathon even more terrifying.
Is there a trailer for the 2026 movie Other Mommy?
Yes. The official YouTube channels of Universal Pictures and Blumhouse Productions have released a trailer for the upcoming movie. Watch it below:
(Hero image: Courtesy of trailer of Other Mommy/ Featured image: Courtesy of othermommy via Instagram)
Note : The information in this article is accurate as of the date of publication.
