Other Mommy arrives in Canadian theatres on Friday, October 9, bringing Jessica Chastain into a supernatural horror story about a young girl who encounters a terrifying presence that resembles her mother.
The film is directed by Rob Savage, whose previous horror work includes Host and Dashcam, and is being released through Universal Pictures in association with Blumhouse and Atomic Monster.
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What Other Mommy is about
Other Mommy follows Bela, an eight-year-old girl who discovers a sinister entity emerging from her closet.
Bela gives the presence its name after it appears in the form of her mother, Ursula, played by Chastain.
The entity’s appearance is only part of the danger, as the story centres on its attempts to get closer to Bela and disrupt the child’s family.
The film’s official Canadian website describes the movie as a production from Blumhouse and Atomic Monster, directed by Savage and written by Nathan Elston.
Jessica Chastain leads the cast
Chastain plays both Bela’s mother and the threatening figure known as Other Mommy.
The cast also includes Jay Duplass as Russ, Bela’s father, along with Dichen Lachman, Sean Kaufman and Karen Allen.
Arabella Olivia Clark plays Bela, the child at the centre of the film’s supernatural threat.
The casting gives the movie a family-focused perspective, with the horror unfolding inside a home rather than in an isolated or unfamiliar setting.
A film adaptation of Josh Malerman’s novel
Other Mommy is adapted from Josh Malerman’s novel Incidents Around the House, the author’s follow-up to the horror novel Bird Box.
In the source story, the supernatural presence is filtered through a child’s understanding of the events around her, a perspective that also shapes the film’s premise.
The adaptation was written by Elston, who has also worked as a writer on the television drama Succession, according to the film’s official promotional material.
When and where to watch Other Mommy
Other Mommy is scheduled to open in Canadian cinemas on October 9, 2026.
Universal Pictures lists the same date for the film’s theatrical release in the United States, while the Canadian promotional site directs viewers to ticket information for local screenings.
As with most theatrical releases, showtimes and availability may differ between cities and cinema chains.
No home-streaming date has been announced through the official film and distributor pages cited for the release.
Why the film is drawing attention
Other Mommy combines several established horror elements, including a child in danger, a haunted home and a supernatural figure capable of imitating a trusted family member.
Its central idea also creates a direct emotional conflict for Bela, who must determine whether the person claiming to be her mother can be trusted.
The film reunites major horror producers Blumhouse and Atomic Monster, with James Wan listed among the producers in the film’s public promotional information.
For audiences looking for a new horror release during the fall movie season, the October 9 theatrical opening places Other Mommy ahead of Halloween and gives the film a clear seasonal audience.
What to know before buying a ticket
- Other Mommy opens in Canadian theatres on October 9, 2026.
- Jessica Chastain plays Ursula and the entity that takes her form.
- Rob Savage directs the film.
- The story is adapted from Josh Malerman’s novel Incidents Around the House.
- Local screening times should be checked with individual theatres.
Frequently Asked Questions
When does Other Mommy come out in Canada?
Other Mommy is scheduled to open in Canadian theatres on Friday, October 9, 2026.
Who stars in Other Mommy?
Jessica Chastain leads the cast as Ursula and the entity known as Other Mommy. Jay Duplass, Arabella Olivia Clark, Dichen Lachman, Sean Kaufman and Karen Allen also appear.
What is Other Mommy about?
The film follows an eight-year-old girl named Bela after a sinister presence emerges from her closet and begins appearing as her mother.
Is Other Mommy based on a book?
Yes. The film is adapted from Josh Malerman’s novel Incidents Around the House.
Who directed Other Mommy?
Rob Savage directed Other Mommy, from a screenplay by Nathan Elston.
Fact-Checked: Key release, production, cast and adaptation details were checked against the film’s official Canadian website and official Universal Pictures and Blumhouse pages.
Disclaimer: Theatre listings, showtimes and future home-release details may vary by location and can change after publication.