Eight-year-old Arabella Olivia Clark (The Housemaid) is set to lead Other Mommy, Universal and Atomic Monster’s new supernatural horror film.

The story follows “8-year-old Bela (Clark), who lives in a home strained by her parents’ troubled marriage, only to see her life further upended by a sinister entity she calls ‘Other Mommy.’ When this malevolent presence emerges from her closet, persistently asking, ‘Can I go inside your heart?’, Bela refuses. But soon, Other Mommy’s manifestations become increasingly aggressive, threatening the safety of Bela’s family.”

Clark joins previously announced cast members Jessica Chastain (IT: Chapter Two, Crimson Peak), Jay Duplass (“The Creep Tapes“), and Dichen Lachman (“Severance”, Jurassic World: Dominion).

Rob Savage (The Boogeyman, Host) directs from a script by Nathan Elston (“Succession”), who adapted from Josh Malerman’s horror novel Incidents Around the House.

Deadline first reported on Clark’s casting.