It will follow Michael Peterson (Firth) who was convicted of murdering his wife Kathleen (Collette) after claiming she died falling down the stairs. Turner will play one of Peterson’s adopted daughters.
Sophie Turner has joined the cast of HBO’s “The Staircase,” a Max series. Turner joins Colin Firth, Toni Collette, Parker Posey, Juliette Binoche, and Rosemarie DeWitt in the cast, which was previously confirmed. The eight-part series is based on the same-named docuseries, as well as novels and stories concerning Michael Peterson (Firth), who was suspected of murdering his wife, Kathleen (Collette), in 2001. He claimed she died after going down the stairs at their house, but investigators believe he bludgeoned her to death and arranged the scene to appear as though she died in an accident.
Margaret Ratliff, one of Michael Peterson’s adoptive kids, will be played by Turner. Turner is best recognized for her portrayal as Sansa Stark in HBO’s “Game of Thrones.” She was nominated for an Emmy for best-supporting actress in a drama for her work on the show. She is also known for portraying Jean Grey in the “X-Men” film franchise’s most recent installments, “X-Men: Apocalypse” and “X-Men: Dark Phoenix.” Turner most recently featured in the Quibi series “Survive,” which premiered last year, with Corey Hawkins. CAA and Independent Talent Group represent her.
In March, HBO Max ordered, “The Staircase” to series. Showrunners Antonio Campos and Maggie Cohn wrote and executive produced it. Six of the eight episodes will be directed by Campos. HBO Max and Annapurna Television collaborated on the project.
The docuseries was first shown in 2004, and its author, Jean-Xavier de Lestrade, continued to update it with fresh facts throughout the years. In 2018, Netflix released it as a 13-episode series.