The first trailer for Other Mommy offers a haunting glimpse into a psychological horror story centered on family, fear, and an unsettling supernatural presence. Set to arrive in theatres on October 9, the film combines supernatural elements with emotional storytelling, creating a deeply unsettling experience that is already drawing attention from horror enthusiasts worldwide.

Directed by Rob Savage, known for his work on Host and The Boogeyman, Other Mommy follows Bela, a young girl who begins interacting with a mysterious entity residing within her home. What makes the situation even more disturbing is that the entity bears an uncanny resemblance to her own mother. As Bela becomes increasingly attached to this strange presence, the boundaries between reality and nightmare begin to disappear.

The trailer immediately establishes an atmosphere of suspense, using quiet moments and haunting imagery to build tension. Rather than relying solely on sudden scares, Other Mommy appears to focus on psychological horror, examining how fear can take root within the safety of one’s own home. The unsettling question, “Can I go inside your heart?” serves as a recurring reminder that something far more sinister is lurking beneath the surface.

Academy Award winner Jessica Chastain takes on a challenging dual role, portraying both Bela’s mother and the enigmatic “Other Mommy.” Her performance in the trailer suggests a fascinating contrast between warmth and menace, adding depth to the film’s central mystery. Jay Duplass appears as Bela’s father, while Arabella Olivia Clark delivers what looks to be a compelling performance as the young protagonist.

The film is produced by James Wan, the creative force behind major horror franchises including The Conjuring, Insidious, and Saw. Based on Josh Malerman’s bestselling novel Incidents Around the House, the adaptation is written by Nathan Elston, whose previous work includes the acclaimed series Succession.

Visually, the trailer embraces a haunting aesthetic filled with dimly lit spaces and unsettling moments that linger in the mind. The combination of Rob Savage’s direction and James Wan’s involvement has raised expectations considerably.

With its psychological themes, impressive cast, and eerie premise, Other Mommy is shaping up to be one of the most intriguing horror releases of 2026, offering audiences a frightening journey into the darker corners of childhood imagination.