**Other Mommy** enters theaters October 9 backed by Blumhouse and Atomic Monster, with James Wan producing and Rob Savage directing an adaptation of Josh Malerman’s novel. Jessica Chastain’s dual role as mother and the sinister entity provides recognizable horror appeal after *It Chapter Two*, while the R-rated supernatural premise aligns with proven mid-tier October performers such as *Smile 2* ($23M) and *Black Phone 2* ($27M). Recent trailer releases have generated solid online views, and advance ticket sales are now live, yet the film lacks the franchise momentum of bigger genre hits. This positions the market-implied consensus around the $21–27M range, reflecting typical tracking for a non-event horror title in a competitive early-October window that also includes *The Social Reckoning*.