Overview
- Universal and Blumhouse publicly released the first trailer on Tuesday, July 21, 2026, after an exclusive preview that played before screenings of The Odyssey and prompted strong social‑media reactions.
- Jessica Chastain appears in a dual role as Bela’s mother and the eponymous entity, with Arabella Olivia Clark as Bela and supporting roles for Jay Duplass, Dichen Lachman, Arian Moayed and Karen Allen.
- Rob Savage directs from a screenplay by Nathan Elston adapting Josh Malerman’s Incidents Around the House, with James Wan producing under the Blumhouse Atomic Monster banner.
- The studio has formally scheduled Other Mommy for wide theatrical release on October 9, 2026, and is using the trailer’s striking images and Blumhouse/Wan branding to build early 'spooky season' awareness.
- Coverage highlights the film’s child‑point‑of‑view horror and original set pieces such as a ball‑pit scare, and positions Other Mommy as a potential fall talker given Savage’s recent genre work and Malerman’s adaptation track record.