Indiana Jones mainstay and Starman star Karen Allen has officially boarded Other Mommy, director Rob Savage‘s adaptation of author Josh Malerman’s horror novel Incidents Around the House, per Deadline.

Character details, however, remain under wraps.

The story follows “8-year-old Bela, 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.”

Eight-year-old Arabella Olivia Clark (The Housemaid) is set to lead Other Mommy, with Jessica Chastain (IT: Chapter Two, Crimson Peak), Jay Duplass (The Creep Tapes), Dichen Lachman (Severance, Jurassic World: Dominion), Sean Kaufman (The Summer I Turned Pretty), and Adam Silver (Velvet Buzzsaw) also starring.

Writer Nathan Elston (Succession) adapted Malerman’s horror novel for the big screen.

Atomic Monster/Blumhouse produces in association with Malerman’s Spin a Black Yarn. James Wan is producing with Alayna Glasthal overseeing for his Atomic Monster. Executive producers include Savage, Malerman, Michael Clear, Judson Scott, Macdara Kelleher, and Ryan Lewis.

Incidents Around the House was published by Del Rey last summer. “This book is the monster that lives inside your closet,“ fellow author Grady Hendrix raved about the Bram Stoker Award nominee and Locus Award Finalist.