Dichen Lachman (Severance) is set to star in Rob Savage‘s new supernatural horror film, based on the book Incidents Around the House by Bird Box‘s Josh Malerman.

Lachman joins Jay Duplass (Dying for Sex) and Jessica Chastain (It Chapter 2).

The book centers on eight-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.

Savage (The Boogeyman) directs from a script by Nathan Elston (Succession).

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

Deadline first reported on Lachman’s casting.