Meet the Confirmed Cast of ‘Other Mommy’ (with Pictures)

Director Rob Savage’s upcoming supernatural psychological horror film ‘Other Mommy‘ adapts Josh Malerman’s 2024 novel ‘Incidents Around the House’. Produced by James Wan under the Blumhouse and Atomic Monster banner, the story follows a family tormented by an entity mimicking a mother’s appearance. Scheduled for a 2026 release by Universal Pictures, the feature brings together an ensemble of established stars and rising talent. Here is a look at the confirmed cast members bringing this chilling story to life.

Jessica Chastain

Jessica Chastain headlines the horror feature in the dual role of Ursula and the titular malevolent entity known as the Other Mommy. The Academy Award-winning actress is widely recognized for her dramatic performances in films such as ‘The Eyes of Tammy Faye‘ and ‘Zero Dark Thirty‘. She also possesses significant experience in the horror genre, having starred in Andy Muschietti’s ‘Mama‘ and ‘It Chapter Two‘. In ‘Other Mommy‘, her character must desperately protect her young daughter from the paranormal duplicate invading their household.

Jay Duplass

Jay Duplass portrays Russell, the husband of Ursula and the father of Bela. The actor and filmmaker gained widespread recognition for his starring role in the acclaimed television series ‘Transparent‘. He has also appeared in prominent television projects such as ‘The Chair‘ and ‘Industry‘, as well as films like ‘Paper Towns‘. In this psychological horror adaptation, his character faces the escalating terror tearing his family apart.

Arabella Olivia Clark

Arabella Olivia Clark takes on the central role of Bela, a young girl directly targeted by the supernatural presence. Her character forms the heart of the narrative as she is haunted by the entity that closely mimics her mother. Clark represents an emerging young talent stepping into a demanding horror lead. Her performance anchors the adaptation of the novel’s perspective on childhood vulnerability and supernatural dread.

Dichen Lachman

Dichen Lachman joins the ensemble cast in an official supporting role for the horror production. The Australian actress is known worldwide for her portrayal of Ms. Casey in the critically acclaimed thriller series ‘Severance‘. Her extensive screen credits also include roles in ‘Altered Carbon‘, ‘Agents of S.H.I.E.L.D.‘, and the blockbuster film ‘Jurassic World Dominion‘. Her involvement in ‘Other Mommy‘ adds further depth to the film’s cast of seasoned genre performers.

Arian Moayed

Arian Moayed features among the supporting cast of the psychological thriller. The Tony and Emmy-nominated actor earned widespread praise for his role as Stewy Hosseini in the acclaimed drama series ‘Succession‘. He has also appeared in major productions such as the Netflix miniseries ‘Inventing Anna‘ and the Marvel Studios feature ‘Spider-Man: No Way Home‘. His casting brings a recognized dramatic presence to the supernatural adaptation.

Karen Allen

Karen Allen appears in the film as Grandma Ruth, the protective grandmother of Bela. Allen is an iconic screen veteran best known for portraying Marion Ravenwood in ‘Raiders of the Lost Ark‘ and ‘Indiana Jones and the Dial of Destiny‘. Her celebrated career also includes memorable roles in classic films such as ‘Starman‘, ‘Scrooged‘, and ‘Animal House‘. In ‘Other Mommy‘, she supports the core family unit as they confront the malevolent forces haunting their home.

Sean Kaufman

Sean Kaufman is officially part of the supporting ensemble for the upcoming Universal Pictures release. The actor gained widespread recognition for portraying Steven Conklin in the popular series ‘The Summer I Turned Pretty‘. His television background also includes appearances in series such as ‘Manifest‘ and ‘Law & Order: Special Victims Unit‘. This film marks a significant transition into the supernatural horror genre for the rising actor.

Adam Silver

Adam Silver joins the cast of the Blumhouse and Atomic Monster horror collaboration. The actor has built an extensive resume with appearances in high-profile television series such as ‘The Offer‘ and ‘Masters of the Air‘. He has also made appearances in episodic projects including ‘NCIS‘ and ‘Casual‘. His role in ‘Other Mommy‘ expands his portfolio into major studio psychological horror.

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