The 2026 horror film Other Mommy officially opened in North America on October 9, 2026. Distributed by Universal Pictures, the feature debuted across 3,200 theaters. Directed by Rob Savage, the 93-minute R-rated film carries an MPAA rating for some bloody violence and language. Industry projections ahead of the debut estimated a $20 million opening weekend.

The feature is an adaptation of Josh Malerman’s novel Incidents Around the House. Jessica Chastain stars in a dual role as both the mother, Ursula, and the demonic doppelgänger known as Other Mommy. Ahead of the release, the production's marketing campaign featured a viral trailer that accumulated over 30 million views on YouTube. The adaptation process also changed the title from the source material's original moniker, a choice that drew criticism from established fans of the book.

Director Rob Savage publicly claimed that the horror film contains 50 jump scares. However, the initial critical consensus has proven largely negative. As of the opening date, the film recorded a Rotten Tomatoes Tomatometer score of 19% based on early reviews. Concurrently, audience reactions on social media platforms remained mixed, with some viewers praising the underlying premise while others criticized the overall execution.

Critical Response and Adaptation Context

Box Office Expectations and Marketing Reach

Reviewers and industry analysts have closely examined the gap between the film's promotional reach and its critical reception. While the viral marketing strategy successfully drove awareness past the 30-million-view mark on YouTube, reviews published on the release date highlighted widespread dissatisfaction with the narrative execution. The adaptation from Incidents Around the House to the screen has been a central point of discussion among both book readers evaluating the title change and film critics assessing Chastain's dual performance as Ursula and the entity.

Beyond the primary box-office projections and marketing figures, the production's structural elements include specific creative choices highlighted by reviewers. Director Rob Savage structured the narrative around a precise count of 50 jump scares, a metric that divided early reviewers across industry publications. Furthermore, the decision by Universal Pictures to alter the title from Josh Malerman’s original novel remains a distinct friction point for literary fans tracking the transition to film.

Financial tracking for the release centers on whether the projected $20 million opening weekend can be sustained against the headwinds of negative critical reviews. Industry analysts note that box-office returns will depend heavily on general audience turnout over the weekend, bridging the gap between social media engagement and the 19% Tomatometer rating recorded on opening day.

Future box-office updates from Universal Pictures will establish the final opening weekend figures for the 3,200 theater run. These upcoming tallies will clarify if the viral marketing campaign's 30 million YouTube views translated into ticket sales despite the adverse critical consensus.