Other Mommy is shaping up as one of October 2026’s major horror releases, with Jessica Chastain taking on a frightening dual role and director Rob Savage pushing a disturbing supernatural premise.
Universal’s upcoming film stars Chastain as Ursula, a seemingly ordinary and caring mother, as well as a sinister double capable of hiding beneath tables and twisting her body into deeply unnatural shapes.
A new kind of horror threat
The film’s unsettling trailer has already generated strong interest. Savage, whose previous work includes The Boogeyman and Host, directs the story ahead of its Australian release in cinemas on 9 October 2026.
A newly released image shows Chastain looking angry, composed and visibly rattled. It is not clear whether the character pictured is Ursula or her malicious counterpart, which makes the still an especially intriguing glimpse at the film’s central mystery.
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What is Other Mommy about?
The story follows a young girl named Bela, who develops a relationship with a sinister entity inside her home. The being looks uncannily like her own mother, turning a familiar family setting into the source of the danger.
From producer James Wan and Blumhouse Atomic Monster, the studio behind Backrooms and Obsession, comes a frightening journey from breakout genre director Rob Savage into the increasingly dark world of a young girl whose home contains an entity resembling her mother.
Who stars in Other Mommy?
Jessica Chastain plays both of the film’s central mother figures. Jay Duplass plays her husband, Daddo, while Arabella Olivia Clark portrays their daughter, Bela.
The supporting cast includes Dichen Lachman, known for Severance; Arian Moayed, who has appeared in Succession and Wonder Man; and legendary scream queen Karen Allen.
When does Other Mommy release?
Other Mommy is scheduled to arrive in Australian cinemas on 9 October 2026. Its combination of a child-focused supernatural story, an unsettling double and Chastain’s two performances makes it one to watch during the 2026 spooky season.
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