Arabella Olivia Clark on Starring in 'Other Mommy'

Ten-year-old actress Arabella Olivia Clark is proud to scare audiences with her breakout performance in the horror film "Other Mommy." The Rob Savage-directed movie debuted at the top of the box office, earning an impressive $12.6 million domestically on its opening day. In the film, Clark plays Bela, the young daughter of Ursula, played by Jessica Chastain, and Russ, played by Jay Duplass. Bela finds herself terrorized by a sinister figure that resembles her mother, known as the titular Other Mommy.

This project marks Clark's first leading role in a feature film, following her previous appearance as a younger version of Amanda Seyfried’s character in the 2025 movie "The Housemaid." Despite specializing in frightening viewers, Clark is not easily scared in real life. When asked what frightens her, she enthusiastically replies that she loves spiders, snakes, the dark, and all things creepy. Her mother, Rachel Clark, notes that Arabella has always been remarkably willing to try new challenges, a mindset that serves her well in the demanding world of professional acting.

Clark's adventurous spirit extends far beyond the silver screen. In her free time, she takes sailing and swimming lessons—skills that proved particularly useful during the physical demands of filming "Other Mommy." She is also an avid reader. Before even landing the role of Bela, she devoured the film's source material, Josh Malerman’s 2024 novel "Incidents Around the House," in just three days. Her passion for the spooky and paranormal is evident in her literary choices, which include classic creepy tales like "Bunnicula" and modern spooky stories by Jeff Kinney.

Working alongside Hollywood heavyweights like Jessica Chastain provided an incredible learning experience for the young actress. Furthermore, Clark has benefited from the mentorship of fellow young star Mckenna Grace, helping her navigate the unique challenges of growing up in the entertainment industry. Despite her early success in horror, Clark is eager to expand her horizons into other genres in the future. She harbors a deep ambition to star in science fiction projects, specifically dreaming of a role in a sequel to "E.T." and the chance to work with legendary director Steven Spielberg.

Whether she is diving into massive water tanks for challenging scenes, facing terrifying doppelgängers, or imagining futuristic alien friendships, Arabella Olivia Clark approaches every opportunity with unbridled enthusiasm. As "Other Mommy" continues to captivate audiences worldwide, it is clear that this talented 10-year-old actress has a long and versatile career ahead of her in Hollywood.