Jessica Chastain stars in Other Mommy

Jessica Chastain stars in Other Mommy

Universal Pictures has released the first official trailer for Other Mommy, an upcoming supernatural horror film starring Jessica Chastain in dual roles. The film, directed by Rob Savage, is based on Josh Malerman's novel Incidents Around the House and is set to arrive in cinemas on October 9, 2026.

Other Mommy follows the story of young Bela, who forms an unsettling bond with a mysterious entity living inside her home. The sinister presence takes the appearance of her own mother, creating a psychological nightmare that blurs the line between family and fear. Jessica Chastain plays both Bela's mother and the terrifying "Other Mommy," showcasing two contrasting performances at the heart of the film.

The cast also includes Jay Duplass as Bela's father, while Arabella Olivia Clark portrays Bela. Supporting roles are played by Dichen Lachman, Arian Moayed, and Karen Allen. The screenplay has been written by Nathan Elston, an award-winning writer known for Succession, and is based on Josh Malerman's bestselling novel Incidents Around the House.

The film is produced by James Wan, alongside Blumhouse and Atomic Monster, studios recognized for producing some of the most successful horror films in recent years. The newly released trailer offers a glimpse into the film's eerie atmosphere, focusing on psychological tension and supernatural horror rather than conventional jump scares.

According to the official description, the film is a "terrifying trip from breakout genre director Rob Savage, into the darkening world of a young girl, Bela, who forms a relationship with a sinister entity in her home who looks uncannily like her own mother." The trailer begins with Bela in her bedroom with odd sounds coming from her closet, and she then finds herself face-to-face with the strange "Other Mommy" creature.

The trailer gets very chilling as it progresses, with the haunting getting much darker as Bela's parents start hearing strange sounds around the house. The makers did not reveal the creature's true form in the glimpse and solely focus on building a tense atmosphere. Jessica Chastain's character seems trapped in the encroaching chaos as the family tries to decipher what the entity wants.

Other Mommy marks Chastain's return to the horror genre after a seven-year absence. Previously, she starred in IT: Chapter Two back in 2019, appearing as the grown-up version of Beverly Marsh. Prior to that, though, Chastain starred in Guillermo del Toro's gothic masterpiece Crimson Peak in 2015, and made her genre debut in 2013 with Andy Muschietti's Mama.

The team assembled for Other Mommy is a regular "Avengers of horror." In addition to Chastain, the film is directed by Rob Savage, the filmmaker who delivered the iconic horror movie Host back in 2020, which he followed up with Dashcam and The Boogeyman. Furthermore, James Wan, the mind behind Saw, Insidious, and The Conjuring, produced the film, putting another genre mastermind behind the camera.

Horror fans are already terrified of the new Jessica Chastain movie, with many taking to social media to express their fear after watching the trailer. The trailer was first shown in theaters with Christopher Nolan's The Odyssey, and it clearly had an impact on audiences. One user wrote online: "That scary mom movie trailer played before The Odyssey. Wtf was that. I'm scared." Another user said: "The exact quote… 'I thought you said the Odyssey wasn’t a scary movie!'"

Other Mommy is scheduled to hit theaters on October 9, 2026, just in time for the spooky season. With its acclaimed creative team, bestselling source material, and Jessica Chastain's dual performance, Other Mommy is already emerging as one of the most anticipated horror movies of 2026.