Psychological horror-thriller, Victorian Psycho, has added Jason Isaacs (Harry Potter, The White Lotus).

Isaacs joins Maika Monroe and Thomasin McKenzie.

Isaacs will play Mr. Pounds, the owner of the estate who employs the young, eccentric governess Winifred Notty.

 The film follows “the young, eccentric governess Winifred Notty (Monroe), who in 1858 arrives at the remote gothic manor known as Ensor House. Her responsibilities include teaching the children table manners and educating them about their family’s history, all whilst hiding her psychopathic tendencies. As Winifred assimilates into life at Ensor House, staff members begin to inexplicably disappear, and the owners of the estate begin to wonder if there is something amiss about their new governess.”

Zachary Wigon (Sanctuary) is directing from a script by author Virginia Feito (Mrs. March), based on her novel of the same name. The book was released on February 4, 2025.

Victorian Psycho is produced by Dan Kagan (Longlegs).

Deadline first reported on Isaacs casting.