“The X-Files” star Gillian Anderson has just scored a new big screen project, and it’s something that she’s thrilled to be part of.

As revealed by Deadline, Anderson is one of the new actors joining Max Irons and Glenn Close as stars of the upcoming film adaptation of Agatha Christie’s 1949 crime novel, “Crooked House.” Aside from Anderson, other newly added cast members are Christina Hendricks, Stefanie Martini, Terence Stamp and Honor Kneafsey.

Shortly after her casting was announced, Anderson took to Twitter to share what she feels about joining the project. “Very happy to be a part! #CrookedHouse,” the 48-year-old actress tweeted.

According to Variety, principal photography of the movie has already started in the UK. This was confirmed by Martini on her Twitter page, where she wrote: “First day done and so excited.”

While most of the actors’ roles are being kept under wraps, A&J Management  revealed on Twitter that Kneafsey will play the character of Josephine.

Written by “Downton Abbey” and “Gosford Park” writer Julian Fellowes, Tim Rose Price and Gilles Paquet-Brenner — who is also directing the movie — “Crooked House” centers on private detective Charles Hayward who is invited to solve a heinous crime where nobody is above suspicion, including his client and former lover, Sophia.

Joe Abrams of Brilliant Films, James Spring of Fred Films and Sally Wood serve as producers of the film.

“Some years back we went through really everything that was available in terms of Agatha Christie and this book [‘Crooked House’] really jumped out for a number of reasons,” Abrams told Deadline. “It’s a standalone — so it’s not a Marple or Poirot mystery — and there is a freshness to it. It won’t necessarily go with a familiar pattern. It’s driven by a young detective and an even younger ingénue who he’s had a past with and who’s either a suspect or the next victim. That’s what’s driving it.”

Although “Crooked House” was one of Christie’s personal favorites among the novels she had written, it is one of her few books that hasn’t been adapted for the screen until now — the others being “Death Comes as the End,” “Destination Unknown,” “Passenger to Frankfurt” and “Postern of Fate.”

 Gillian Anderson “The X-Files” star Gillian Anderson took to Twitter to share what she feels about joining the cast of the film adaptation of Agatha Christie’s “Crooked House.” Pictured: Anderson attends “The X-Files” Fox premiere at California Science Center on Jan. 12, 2016 in Los Angeles, Calif. Photo: Getty Images/Araya Diaz