There's a moment in Other Mommy that lingers long after the credits roll: Jessica Chastain's unsettling grin as the titular creature. It's a smile that's meant to be warm, but instead lands somewhere deeply wrong. Now, a new behind-the-scenes featurette, A Family in Pieces, pulls back the curtain on how that iconic expression came to life.
Chastain plays both Mommy and Other Mommy, a dual role that let her explore what she calls a "very complicated relationship to motherhood." The featurette reveals how she and director Rob Savage crafted the entity's performance, focusing on the desperation behind its attempts to mimic human affection. "There's like a desperation to her," Chastain explains, and you can see it in the way Other Mommy's smile never quite reaches its eyes.
That smile was the first thing Savage saw from Chastain on set. "I saw the face, I knew this movie was gonna be freaky as hell," he recalls in the clip. "It's a smiley face. But there's nothing happy about it, I'll tell you that." It's a testament to Chastain's skill that a simple facial expression could set the tone for an entire horror film.
But the featurette also highlights the subtler moments that make the performance so effective. Savage asked Chastain to show young Bela (Arabella Olivia Clark) "the tiniest little crack in the facade between Mummy and Daddo," played by Jay Duplass. What she delivered was a flicker in her eyes—a small but devastating tell that Bela picks up on, even if she can't articulate it. It's a masterclass in acting, proving that sometimes less is more.
Clark, who shares many scenes with Chastain, had nothing but praise for her co-star. She calls Chastain "the best mentor I could ever hope to learn from" and notes that even when the actress was terrifying as Other Mommy, "Jessica always makes me feel really safe on set." It's a touching contrast to the on-screen tension, and a reminder of the trust required to pull off such a demanding role.
For fans of Chastain's work, this featurette is a must-watch. It offers a rare glimpse into her creative process and the collaborative effort behind one of the year's most talked-about horror performances. If you're curious about her other projects, you might also want to check out her upcoming Netflix film or revisit the digital release details for Other Mommy.
Other Mommy is available now on digital and arrives on 4K Ultra HD, Blu-ray, and DVD on December 29. For more horror insights, you can also explore the most intense movie scenes ever ranked or dive into this Netflix mind-bender. Stay tuned for more exclusive content.
