Double the Chastain, Double the Trauma: The First Trailer for ‘Other Mommy’ Arrives

July 21, 2026

Written by Kelli Marchman McNeely

Kelli Marchman McNeely is the owner of HorrorFuel.com. She is an Executive Producer of "13 Slays Till Christmas" which is out on Digital and DVD and now streaming on Tubi. She has several other films in the works. Kelli is an animal lover and a true horror addict since the age of 9 when she saw Friday the 13th. Email: [email protected]

Think your childhood imaginary friend was creepy? Meet “Other Mommy.” It’s the ultimate nightmare for anyone who’s ever called out for mom in the dark and gotten the wrong answer.

This psychological horror comes from the combined nightmare factory of horror royalty James Wan (Saw, The Conjuring) and Blumhouse Atomic Monster. It’s under the sharp direction of breakout scare master Rob Savage (Host). Be sure to check out our interview with Savage about his previous film The Boogeyman.

Based on Josh Malerman’s (Bird Box) bestselling novel Incidents Around the House and adapted by Succession writer Nathan Elston, the film follows a young girl named Bela (Arabella Olivia Clark) who forms a bond with a sinister entity invading her home. The catch? The entity looks uncannily like her actual mother.

A Stellar Cast

Academy Award® winner Jessica Chastain pulls double duty in a haunting dual role as both Bela’s genuine mother and the disturbing “Other Mommy.” At the same time, Jay Duplass plays her perpetually stressed father, “Daddo.”

Backed by an all-star supporting lineup that includes Dichen Lachman (Severance), Arian Moayed (Succession), and screen icon Karen Allen (Indiana Jones), Other Mommy promises to take the universal comfort of maternal love and twist it into something profoundly wrong.

Coming This Spooky Season

Lock your doors and mark your calendar; Other Mommy hits theaters on October 9th. Remember that if your mother suddenly starts acting a little off, maybe don’t answer her.

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