Other Mommy is a supernatural horror movie starring Jessica Chastain in a chilling dual role as a mother and a sinister entity that takes her appearance. Directed by Rob Savage and produced by James Wan, the film brings a disturbing family story to the big screen, where a young girl must decide whether the mysterious figure promising her love can be trusted.
The horror movie opened in US theaters on October 9, 2026. Here is everything to know about the story, cast, trailer, original book, and post-credits scene.
What Is Other Mommy About?
Other Mommy follows Bela, a young girl who encounters a mysterious entity hiding in the darkness of her bedroom closet. The creature appears as her mother, Ursula, and promises Bela the affection and protection she craves.
But the relationship becomes increasingly disturbing as the entity tries to get closer to Bela and gain control over her. As strange events unfold inside the family home, Bela struggles to understand what the creature wants and whether the person standing in front of her is really her mother.
The story explores childhood fears, complicated family relationships, motherhood, and the frightening possibility that something familiar may not be what it seems.
Other Mommy Release Date
Other Mommy was released in US theaters on October 9, 2026, through Universal Pictures.
The film is a theatrical horror release from Blumhouse Productions and Atomic Monster. International release dates and cinema availability may differ by market, so viewers should check local listings for screenings.
For the latest official details and tickets, visit the official Universal Pictures movie page.
Other Mommy Trailer: Where to Watch
The official Other Mommy trailer introduces the disturbing relationship between Bela and the entity that looks like her mother. It teases unsettling encounters inside the family home and hints at the danger hidden behind the creature’s promises of love.
The trailer also highlights Jessica Chastain’s dual performance, switching between Bela’s mother and the sinister presence that imitates her.
You can find the official trailer through Universal Pictures’ movie announcement and trailer page.
Other Mommy Cast
The film features an ensemble led by Jessica Chastain.
- Jessica Chastain as Ursula and Other Mommy
- Jay Duplass as Russ, Bela’s father
- Arabella Olivia Clark as Bela
- Dichen Lachman in a supporting role
- Arian Moayed as Frank
- Karen Allen in a supporting role
Chastain’s dual role is central to the film’s horror, as the supernatural entity adopts the appearance of Bela’s mother. This creates uncertainty about whom Bela can trust and how much danger the family is facing.
Is Other Mommy Based on a Book?
Yes. Other Mommy is based on Incidents Around the House, a horror novel by Josh Malerman, the author of Bird Box.
The movie adapts the book’s central idea of a young girl confronted by a disturbing presence she calls Other Mommy. The film was directed by Rob Savage, with a screenplay by Nathan Elston.
Although the movie draws from the novel, the two versions do not have identical endings. Readers familiar with the book may notice important differences in how Bela’s story unfolds.
Is Other Mommy Based on Coraline?
Other Mommy is based on Josh Malerman’s novel Incidents Around the House, not on Neil Gaiman’s Coraline.
Both stories involve a young protagonist facing an unsettling, otherworldly presence connected to family and home. Those similarities may explain why viewers compare them, but the official source material for Other Mommy is Malerman’s novel.
Does Other Mommy Have a Post-Credits Scene?
Yes, Other Mommy has a post-credits scene.
Spoiler warning: The final scene suggests that the entity may not be completely gone. After the main story appears to reach its conclusion, Other Mommy briefly appears again, leaving viewers with an unsettling final reminder of the threat.
The scene also leaves room for questions about whether Bela and her family are truly safe.
Other Mommy Ending: What Happens to Bela?
Spoilers ahead.
Bela ultimately resists Other Mommy rather than allowing the entity to possess her. She begins to understand that her parents are imperfect and cannot always protect her from every painful experience. That realization helps her resist the creature’s emotional manipulation.
However, the post-credits appearance complicates the apparent victory. Although the family believes the immediate threat has passed, the final moment suggests that Other Mommy may still be present.
The movie’s ending also differs significantly from the novel, which takes Bela’s fate in a much darker direction.
Where to Watch Other Mommy
Other Mommy opened in US theaters on October 9, 2026. For viewers hoping to watch it at home, a digital rental or purchase date and a streaming premiere should be confirmed through official distributor announcements.
At the time of writing, do not assume that the film is already available on Netflix, Peacock, or another subscription service. Check Universal Pictures’ official listings for current viewing options.
For more entertainment release guides, explore FilmRadar’s upcoming movies in 2026 and our coverage of The Girlfriend on Prime Video.
Final Thoughts
Other Mommy combines supernatural horror with a story about childhood fears, motherhood, and family tension. With Jessica Chastain playing both a mother and the entity imitating her, the film builds its central mystery around a disturbing question: what happens when the person promising to protect you may be the one you need protection from?