Sydney Sweeney and Amanda Seyfried will star in director Paul Feig’s film adaptation of “The Housemaid,” the novel by Freida McFadden, set up at Lionsgate.

Sweeney’s deal has closed and Seyfried is in final negotiations for the psychological thriller film based on the bestselling 2022 book.

In the film, Sweeney will play Millie, a struggling young woman who is relieved to get a fresh start as a housemaid to upscale, wealthy couple Nina (Seyfried) and Andrew. Millie soon learns that the family’s secrets are far more dangerous than her own.

Rebecca Sonnenshine wrote the screenplay.

Todd Lieberman will produce for Hidden Pictures, and Carly Kleinbart Elter will oversee the project. Feigco’s Feig and Laura Fischer are also producing, and Sweeney and Seyfried will executive produce alongside Alex Young and McFadden.

“I’m thrilled to have ‘The Housemaid’ join our upcoming slate,” Adam Fogelson, the chair of Lionsgate Motion Picture Group,...