LOS ANGELES — "Other Mommy," a low-budget Blumhouse horror film starring Jessica Chastain in a dual role, topped the weekend box office with $27.5 million domestically despite brutal reviews — while Aaron Sorkin's star-studded Facebook-whistleblower drama "The Social Reckoning" bombed with just $5.5 million.

"Other Mommy," directed by Rob Savage for Universal and Blumhouse's Atomic Monster label, pulled in $45.2 million globally after opening in 50 international markets, on a production budget of roughly $19 million. The film earned a D+ CinemaScore from opening-weekend audiences — typically a red flag for a title's staying power — but still cleared $27.5 million from 3,365 theaters. Chastain plays both a mother and the sinister "Other Mommy" of the title, alongside Jay Duplass, Dichen Lachman, Arian Moayed and Karen Allen.

A rough night for prestige drama

Sorkin's "The Social Reckoning," from Sony's Columbia Pictures, fared far worse. The film, which Sorkin wrote and directed, stars Jeremy Strong, Jeremy Allen White and Mikey Madison, and had been tracking for a $7-8 million opening before landing at just $5.5 million from 2,606 theaters on an estimated $30 million budget. Reviews were mixed to negative, and audiences handed it a tepid B- CinemaScore.

"OTHER MOMMY" $27.5M · "THE SOCIAL RECKONING" $5.5M

The gap is a stark contrast to Sorkin's last word-of-mouth hit on similar subject matter: "The Social Network," which opened to more than $22 million back in 2010. For Blumhouse, the result is another reminder that a recognizable star and a scary premise can outperform awards-season pedigree at the multiplex, reviews notwithstanding. Neither studio has commented beyond releasing the weekend box-office figures, and both films remain in wide release this week as studios watch whether word-of-mouth shifts their trajectories.