Other Mommy opened at No. 1 in North America despite weak reviews. Released on October 9, 2026, Rob Savage’s horror film earned $27.5 million domestically and $45.2 million worldwide while receiving a D+ CinemaScore. It adapts Josh Malerman’s 2024 novel Incidents Around the House and follows a girl targeted by an entity wearing her mother’s face.
For viewers asking what Other Mommy is about, it is family fear wrapped inside possession horror: Bela is not only running from a monster, but being asked to trust it.
Key Highlights
- Jessica Chastain plays both Ursula and the sinister entity, with Arabella Olivia Clark as Bela and Jay Duplass as Russ.
- The film earned $27.5 million from 3,365 North American theatres and reached $45.2 million globally in its opening weekend.
- Rotten Tomatoes showed a 17% critics score from 58 reviews and a 47% audience score from 1,000+ verified ratings on October 12.
- Major spoilers follow: the movie ending is much less bleak than Malerman’s novel.
What Is Other Mommy About and Why Did Its Trailer Go Viral?
Seven-year-old Bela begins seeing a figure in her home that looks exactly like her mother, Ursula. “Other Mommy” lives in the darkness around Bela, works on her loneliness and repeatedly asks whether it can “go inside” her heart. In the film’s rules, that invitation means permission to possess her.
Ursula is often absent, her marriage to Russ is strained, and Bela knows more about the adults around her than they realise. That gap gives the entity room to pose as the mother who will always stay.
The marketing became a story by itself. ABC News reported that the trailer frightened moviegoers during screenings of The Odyssey, with some social-media users warning others about its disturbing kitchen-table reveal. Universal’s official trailer also directs viewers to the film’s official Other Mommy Instagram account, giving horror fans a direct source for promotional updates.
Who Is in the Other Mommy Cast?
Chastain plays both Ursula and the creature copying her. Arabella Olivia Clark is Bela, while Jay Duplass plays Russ. Dichen Lachman appears as Lois Anthony, Arian Moayed plays Uncle Frank, and Karen Allen is Grandma Ruth.
Rob Savage directs Nathan Elston’s screenplay. James Wan produces through Blumhouse Atomic Monster, while the source novel comes from Bird Box author Josh Malerman. The official Universal Pictures page for Other Mommy confirms the main cast and production team.
Three details stand out:
- Chastain’s physical performance helps shape the creature’s unnerving movement, including the contorted imagery heavily used in the campaign.
- Bela stays at the centre rather than the story becoming a standard exorcism plot.
- The adaptation changes the novel’s ending, so readers should expect a different final outcome.
What Do Reviews Say and Why Is the Box Office So Strong?
The critical response has been rough. Rotten Tomatoes’ Other Mommy page listed the film at 17% from 58 critic reviews, with the consensus praising Chastain’s performance but criticising the film’s sillier turns. The Indian Express also argued that the movie reveals too much too early and leans on familiar jump scares.
AP reported a D+ CinemaScore, yet the ticket sales tell a very different commercial story:
- The film collected $27.5 million from 3,365 North American theatres against an estimated production budget of about $19 million.
- Its global opening reached $45.2 million across 50 international markets.
- Universal said roughly two-thirds of opening audiences were aged 18 to 34, while the gender split was approximately even.
That contrast is particularly striking. According to the Associated Press box-office report, Other Mommy comfortably took first place even with poor reviews. The viral trailer, Chastain’s star power and horror’s strong 2026 theatrical run help explain why the criticism did not stop audiences from turning up.
Other Mommy Ending Explained: Does Bela Survive?
Spoiler warning: Bela survives, and Other Mommy does not possess her.
Near the end, Bela learns painful truths about her family and initially appears ready to surrender. Instead, she recognises that her parents are flawed and that the entity has used her fear and disappointment to gain permission. Bela refuses it, breaking the creature’s hold.
Ursula still looks emotionally unsettled in the closing family scene, showing that defeating the supernatural threat did not repair every family problem. A post-credits sting then brings Other Mommy back for one final “shhh,” leaving the creature’s survival open.
The film also changes the book dramatically. In Malerman’s novel, Ursula and Russ are killed, Bela eventually allows Other Mommy inside, and the entity takes control of her body. The movie therefore gives Bela a far more hopeful fate.
FAQ
Is Other Mommy based on a book?
Yes. The film adapts Josh Malerman’s 2024 horror novel Incidents Around the House, although Rob Savage’s movie changes several important details, including its final outcome.
Who plays Other Mommy and Ursula?
Jessica Chastain plays both Ursula and the entity copying her appearance, giving the film its central visual trick and one of its most promoted performances.
Does Bela die at the end of Other Mommy?
No. Bela survives the film and refuses the entity permission to possess her after confronting the painful family truths that Other Mommy had exploited against her.
Is the movie ending different from the novel?
Yes. The novel ends far more brutally, with Bela allowing the entity inside after her parents are killed, while the film instead lets her resist it.
Is there a post-credits scene in Other Mommy?
Yes. Other Mommy briefly reappears after the credits and shushes the audience, signalling that the entity may still exist despite Bela’s apparent victory over it.
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