Oona Chaplin of Game of Thrones fame has joined the cast of the forthcoming Avatar sequels. After nearly a decade on James Cameron's back-burner, it seems as if the followups to the ridiculously-successful 2009 blockbuster allegory for environmentalism are finally beginning to take shape. Although the exact number of sequels planned has fluctuated in the intervening period, the current count seems to be at four new Avatar movies, which are slated for release between 2020 and 2025.

Although concrete details on the forthcoming quartet of movies are scarce as of now, the majority of the original Avatar cast is expected to return - including, as it were, Sigourney Weaver's Dr. Grace Augustine and Stephen Lang's treacherous Colonel Miles Quaritch, both of whom were seemingly dead by the end of the first movie. Sam Worthington's Jake and Zoe Saldana's Neytiri are once again expected to be the focus of the Avatar sequels.

Joining that already-impressive cast (according to The Wrap) is Charlie Chaplin's granddaughter, Oona, who will play a character called Varang, described as being "strong and vibrant." The actress is slated to be a central figure in all four of the planned Avatar sequels, but further details are not to be found at this early stage in production.

Oona Chaplin famously played Talisa Maegyr/Stark in Game of Thrones and - without wanting to trigger any unpleasant memories - was one of the many victims of the fabled "Red Wedding" episode. More recently, the actress has had success in the BBC and FX series Taboo as Zilpha Geary.

Despite boasting one of the most famous surnames in show business, Oona Chaplin has proven her own acting prowess in her television roles and is a welcome, undoubtedly talented addition to the cast of Avatar. Although details surrounding her character are thin on the ground, the name Varang sounds more likely to be a Na'vi character than a human one. As such, it's very possible that viewers won't see Chaplin on screen in the traditional sense, and instead she'll be motion-captured along with Sam Worthington and Zoe Saldana.

With that said, the Avatar sequels are the most high-profile role Oona has landed by quite some margin. Although Game of Thrones is perhaps the biggest thing on television right now, Chaplin was a relatively short-lived character during the show's earlier seasons and it'll be interesting to see how she handles the step up to the big screen blockbuster league, with the Avatar franchise.

NEXT: Why James Cameron Isn't Worried About the Avatar Sequels' Delay

Source: The Wrap