“The Haunting of Hill House” star Kate Siegel is returning for “The Haunting of Bly Manor,” TheWrap has learned exclusively.

Siegel, who played Theo Crain on “Hill House,” is the fourth Season 1 alum to join Season 2 of the Netflix horror anthology series, following the castings of Henry Thomas, Oliver Jackson-Cohen and Victoria Pedretti. The streaming service told TheWrap it’s keeping character details for Siegel’s role on “Bly Manor” — which is set to launch in 2020 — under wraps for now.

While “The Haunting of Hill House” was an adaptation of Shirley Jackson’s 1959 gothic novel of the same name, when Netflix renewed the Mike Flanagan-created series for Season 2 — and turned it into “The Haunting” anthology — back in February, the streaming service revealed that next chapter would be “a new story with all new characters” titled “The Haunting of Bly Manor,” based on Henry James’ 1898 horror novella, “The Turn of the Screw.”

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For “Bly Manor,” Pedretti will star as a governess named Dani “who takes care of two very unusual children” and that Jackson-Cohen has been cast as Peter, described as “a charming fellow.” Just like with Siegel, details about Thomas’ character have not yet been revealed.

See Flanagan’s tweet about Siegel’s casting below.

THE HAUNTING wouldn't be THE HAUNTING without fan favorite KATE SIEGEL… and I'm elated to confirm that she'll be joining us at BLY MANOR. @k8siegel @haunting — Mike Flanagan (@flanaganfilm) August 29, 2019

“The Haunting of Hill House” premiered last October and centered around the Crain family: father Hugh (older version played by Timothy Hutton, younger version played by Thomas), mother Olivia (Carla Gugino), and their children, Steve (Michiel Huisman), Shirley (Elizabeth Reaser), Theo (Siegel), Luke (Jackson-Cohen) and Nellie (Pedretti).

Also Read: 'Haunting of Hill House' Alum Oliver Jackson-Cohen Joins 'Haunting of Bly Manor' (Exclusive)

The story follows the events that transpired during the one summer the Crains lived in the titular haunted home and their lives decades after leaving Hill House due to a tragic incident.

Flanagan is the creator of “The Haunting of Bly Manor” with Trevor Macy executive producing. Macy and Flanagan — who signed an overall deal with Netflix in February — will produce through their Intrepid Pictures banner, with Paramount TV and Amblin TV also producing.

Intrepid Pictures has multiple upcoming projects including “Doctor Sleep,” distributed by Warner Bros. on Nov. 8, which Flanagan wrote and directed and Macy produced; “Midnight Mass,” a horror series for Netflix; and horror thriller “Eli,” directed by Ciarán Foy and produced by Macy, for Netflix.