‘Other Mommy’ Release Date, Trailer, Cast, Plot and Where to Watch
Jessica Chastain is returning to horror with ‘Other Mommy’, a supernatural film from Universal Pictures and Blumhouse Atomic Monster that is due in theaters on October 9, 2026. Rob Savage directs from a script by Nathan Elston, and the story is based on Josh Malerman’s book Incidents Around the House.
A jump scare in a trailer attached to showings of ‘The Odyssey’ has already made the film a topic of conversation among moviegoers. With the premiere approaching, here is what is known about ‘Other Mommy’, from its schedule and cast to its story and how audiences can see it.
‘Other Mommy’ Release Date and Theatrical Rollout
The film arrives in theaters on Friday, October 9, 2026, after an earlier plan to open it on May 8, 2026. The move places the horror release squarely in the fall season.
Production began in May 2025 in Dublin, Ireland, and the movie had previously been scheduled for a theatrical debut in May 2026. That timeline shows a gap of about a year between the start of filming and the revised opening date.
Producer James Wan is attached to the project through Blumhouse Atomic Monster, the studio behind ‘Backrooms’ and ‘Obsession’. That pairing gives the film a clear lineage within the current wave of studio backed horror.
‘Other Mommy’ Trailer and Audience Reaction
Universal released the first trailer on a Tuesday, and it had been playing exclusively before screenings of Christopher Nolan’s ‘The Odyssey’, which is also a Universal release. That placement put the footage in front of a very large theatrical audience before it reached the wider internet.
The footage shows Bela becoming attached to a mysterious woman who looks exactly like her mother, and the lookalike soon behaves in unnatural ways, including crawling beneath a kitchen table with her body twisted. Near the end, it becomes hard for Bela to tell whether she is speaking to her real mother or to the entity.
Viewers online singled out the table scene, with one commenter writing that it “got me.” Another reaction praised the preview as compelling while reserving judgment on how the finished movie will turn out. That wait and see response is common for a film whose marketing has leaned so heavily on a single frightening image.
‘Other Mommy’ Cast and Creative Team
Chastain plays two parts in the film, Ursula and the figure known as “Other Mommy”. The dual role means she handled double duty on set.
Jay Duplass plays Russ, who is Bela’s father and Ursula’s husband, while Arabella Olivia Clark plays Bela. The supporting cast also includes Dichen Lachman, Arian Moayed, Karen Allen, Sean Kaufman, Adam Silver and Rosie Anne O’Gorman.
The project marks Chastain’s return to the genre after earlier horror credits that include ‘Take Shelter’, ‘Mama’ and ‘Crimson Peak’. Savage is described as a breakout genre director, and he leads the film into the world of a young girl who forms a relationship with a sinister presence in her home.
‘Other Mommy’ Plot and Where to Watch
The official synopsis describes Bela as an 8 year old girl in a home with marital problems who confronts a sinister entity that emerges from her closet. The presence, whom she calls “Other Mommy,” grows increasingly threatening to her and her family.
The story draws on Malerman’s book, and the trailer suggests a tale built around a child, a parent and a double who looks like her. The setup places a family under strain at the center of the scare.
Audiences will need to buy tickets at a local cinema because Blumhouse, Atomic Monster and Universal are releasing the film in theaters. No digital or streaming dates have been announced, and those details typically come only after a movie has played in theaters.
With a lookalike mother at the heart of the story and Chastain carrying both roles, ‘Other Mommy’ will rest on whether the performance can make the doppelganger as unsettling on the big screen as the trailer promised, so which of Chastain’s two characters do you expect to leave the stronger mark in the comments once the film opens.
