Jessica Chastain plays both sides of the nightmare in the second trailer for Other Mommy. She appears as Bela’s mother and as the smiling entity that copies her face, turning a familiar parent into the horror movie’s central threat.
Other Mommy opens in theaters October 9, 2026. Rob Savage directs the adaptation of Josh Malerman’s novel Incidents Around the House, with James Wan among the producers.
Other Mommy release details at a glance
- Theatrical release: October 9, 2026.
- Jessica Chastain: Mommy and Other Mommy.
- Bela: Arabella Olivia Clark.
- Daddo: Jay Duplass.
- Director: Rob Savage.
- Based on: Incidents Around the House by Josh Malerman.
Jessica Chastain’s double role is the trailer’s main reveal
The new footage first presents Chastain as Bela’s mother inside an ordinary family home. It then uses the same face for Other Mommy, a presence that appears to the child and asks to be allowed closer. The physical resemblance makes it harder for Bela to separate safety from danger.
Chastain changes posture, expression and movement between the two roles instead of relying on a title card to explain the difference. Other Mommy can look calm and welcoming before the trailer exposes a more distorted form. The result keeps the threat connected to the family even when it is clearly supernatural.
Bela’s family is trapped inside the threat
Arabella Olivia Clark plays Bela, the child who can see and speak with Other Mommy. Jay Duplass plays Daddo. The trailer shows both parents trying to understand what Bela is experiencing as the entity becomes more direct and violent.
Universal’s synopsis frames the story around a family already under pressure before the supernatural danger fully enters their home. The official material does not explain every rule governing Other Mommy, and it does not reveal whether the creature’s request can be reversed after Bela answers.
Who is in the Other Mommy cast?
Jessica Chastain, Jay Duplass and Arabella Olivia Clark lead the family at the center of the film. The announced cast also includes Dichen Lachman, Arian Moayed and Karen Allen.
Nathan Elston wrote the screenplay from Malerman’s novel. Rob Savage directs, and James Wan produces. The checked official synopsis confirms those credits but does not assign a named role to every supporting performer.
When and where to watch Other Mommy
Other Mommy is scheduled to open in theaters on October 9, 2026. Universal has not announced a dated streaming or digital release in the official material checked for this article.
A later home release may be announced after the theatrical run, but no service, purchase date or rental date should be treated as confirmed yet.
Track the confirmed release and cast on the Other Mommy movie page, browse more Movies, or follow new trailers in News.
Other Mommy FAQ
When is Other Mommy released?
Other Mommy opens in theaters October 9, 2026.
Who does Jessica Chastain play?
Jessica Chastain plays Bela’s mother and the supernatural double known as Other Mommy.
Is Other Mommy based on a book?
Yes. Nathan Elston’s screenplay is based on Josh Malerman’s novel Incidents Around the House.
