A striking new poster for the upcoming supernatural horror film Other Mommy has been unveiled, heightening anticipation for its theatrical release on October 9, 2026.

Shared by horror outlet Bloody Disgusting, the image features Oscar-winning actress Jessica Chastain in a chilling dual role that promises to deliver one of the season’s most unsettling cinematic experiences.

The poster captures Chastain with an eerie, almost otherworldly expression that immediately signals the film’s central premise: a mother’s identity under supernatural threat. Produced by James Wan through his Blumhouse–Atomic Monster banner and directed by Rob Savage, Other Mommy adapts Josh Malerman’s 2024 novel Incidents Around the House. The story centers on a young girl named Bela who forms a relationship with a sinister entity that appears in the form of her own mother.

Jessica Chastain stars as both Ursula, Bela’s real mother, and the malevolent “Other Mommy,” a manifestation of the entity that invades the family’s home. This dual performance places the actress at the heart of the film’s psychological and supernatural tension.

Supporting the lead is a strong ensemble that includes Jay Duplass as Russ (referred to as “Daddo” in the story), Arabella Olivia Clark as the young Bela, Dichen Lachman, Arian Moayed, and screen veteran Karen Allen as Grandma Ruth.

Director Rob Savage, known for the found-footage horror hit Host and the Stephen King adaptation The Boogeyman, brings his distinctive style of intimate, tension-driven horror to the project. The screenplay comes from Nathan Elston, a writer whose credits include the acclaimed series Succession.

James Wan, the influential producer and director behind franchises such as Saw, Insidious, and The Conjuring, oversees production, ensuring the film carries the polished yet deeply unsettling tone associated with his recent work.

The film follows Bela, an eight-year-old living in a household already strained by marital problems, as she encounters a presence that emerges from her closet. What begins as a curious connection with the entity she names “Other Mommy” gradually turns threatening, forcing the family to confront a force that looks and sounds uncannily like the child’s mother.

The story explores themes of motherhood, identity, and the fragility of domestic safety, wrapping psychological unease in classic supernatural horror elements.

Other Mommy marks Chastain’s return to the horror genre after previous appearances in Mama (2013), Crimson Peak (2015), and It Chapter Two (2019). Her ability to convey both protective maternal warmth and chilling menace is expected to be a major draw.

Public Reaction

Early promotional materials, including the recently released trailer, have already generated strong reactions for their atmosphere and jump-scare potential.

Universal Pictures will distribute the film, positioning it as a key October horror release timed for the Halloween season. The new poster arrives as part of an escalating marketing campaign that has included trailers, stills, and additional imagery highlighting the film’s bloodier and more intense sequences.

A previous release date of May 2026 was shifted to October, allowing the studio to place the movie more squarely within the traditional fall horror window.

Malerman’s source novel, Incidents Around the House, built a reputation for its quiet, escalating dread and focus on a child’s perspective amid domestic supernatural intrusion. The adaptation retains that intimate scale while expanding the visual and atmospheric possibilities of the big screen.

Savage’s direction is expected to emphasize the uncanny resemblance between mother and entity, using performance, practical effects, and carefully crafted sound design to keep audiences unsettled.

As October 9 approaches, Other Mommy is shaping up to be one of the most closely watched horror titles of the year. The combination of a major star in a dual role, a respected genre director, and the producing power of James Wan and Blumhouse Atomic Monster has created significant expectations.

The newly released poster serves as both a visual statement and a warning: in this household, the face of comfort may hide something far more dangerous.

Horror fans and general audiences alike will soon discover whether the entity known as Other Mommy can truly get inside their hearts and whether anyone can stop it.