Summary (tl;dr)

The trailer for "Other Mommy," a new supernatural horror film starring Jessica Chastain, was released today, causing the film and its lead actress to trend as viewers react to its unsettling content.

Essential Background

"Other Mommy" is an upcoming horror film based on the 2024 novel "Incidents Around the House" by Josh Malerman. The project was announced in April 2025 with Jessica Chastain attached to star, and principal photography began in Dublin, Ireland, in May 2025. The film is produced by horror veteran James Wan's Atomic Monster banner and Blumhouse Productions, and directed by Rob Savage, known for his work on "Host" and "The Boogeyman."

The Full Story

Today, July 21, 2026, Universal Pictures and Blumhouse released the official trailer for "Other Mommy," igniting significant online buzz and causing the movie and Jessica Chastain to trend. The trailer, which has been described as "terrifying" and "creepy," features Chastain in a dual role as Ursula, a mother, and a sinister, body-twisting supernatural entity that takes on Ursula's likeness to interact with her daughter, Bela. Many viewers reportedly experienced jump scares when the trailer was shown in theaters ahead of screenings for Christopher Nolan's "The Odyssey." The film is set to be released in the United States on October 9, 2026.

Why It Matters

The strong reaction to the "Other Mommy" trailer highlights the enduring appeal of the supernatural horror genre and the public's excitement for Jessica Chastain's return to horror, following her roles in films like "Mama" and "It: Chapter Two." The intense marketing strategy, including pre-screening the trailer before a major film like "The Odyssey," has effectively generated significant anticipation for its Halloween season release. The film's trending status indicates a high level of public interest, positioning it as a potentially significant horror event for 2026.

Geographic Location

• United States (scheduled film release and trailer screenings)
• Dublin, County Dublin, Ireland (principal photography)