Jessica Chastain Stars in Blumhouse's 'Other Mommy' Trailer

Universal Pictures and Blumhouse Atomic Monster have released the official trailer for Rob Savage's upcoming psychological horror film, 'Other Mommy.' The film, produced by James Wan, stars Academy Award winner Jessica Chastain in a dual role as both the protective mother of an eight-year-old girl named Bela and a terrifying entity known as "Other Mommy" that manifests within the family home. Arabella Olivia Clark portrays Bela, the young girl who forms a chilling bond with this supernatural entity, while Jay Duplass plays her father, Daddo. The narrative is adapted from Josh Malerman's bestselling novel, 'Incidents Around the House,' and centers on the psychological terror experienced by a child manipulated by a supernatural force seeking access to her heart.

Directed by Rob Savage, known for his work on 'Host' and 'The Boogeyman,' and produced by James Wan, a prominent figure in modern horror with credits including 'Saw,' 'Insidious,' and 'The Conjuring,' 'Other Mommy' aims to deliver a deeply unsettling experience. The screenplay was written by WGA Award winner Nathan Elston, who also worked on 'Succession.' The supporting cast includes Dichen Lachman, recognized for her role in 'Severance,' Arian Moayed from 'Succession,' and screen legend Karen Allen, famous for her role in the 'Indiana Jones' franchise. The project is executive produced by Michael Clear, Judson Scott, Rob Savage, Josh Malerman, and Ryan Lewis, bringing together significant talent in the horror genre.

The film's plot delves into the psychological manipulation of a young child by an entity that assumes the guise of her mother. This "Other Mommy" figure represents a sinister presence within the domestic sphere, preying on the child's vulnerability. The trailer showcases unsettling imagery and a tense atmosphere, hinting at the psychological depth and horror elements that audiences can expect. The adaptation of Malerman's novel suggests a narrative rich in suspense and dread, exploring themes of identity, fear, and the uncanny within a family setting.

'Other Mommy' is scheduled for an exclusive theatrical release on October 9, 2026. The collaboration between Universal Pictures and Blumhouse Atomic Monster, a division of Atomic Monster founded by James Wan, signifies a significant production in the horror landscape. This partnership is expected to leverage the strengths of both entities in delivering high-quality genre films to a wide audience. The film's focus on psychological horror and a compelling dual performance from Jessica Chastain positions it as a notable entry in the genre for 2026.