Nathalie Emmanuel has just joined the cast of 20th Century Fox's "The Maze Runner" sequel.

The 25-year-old British actress, best known for her role as Missandei on the hit HBO fantasy drama series "Game of Thrones," will play Harriet in "The Maze Runner: Scorch Trials," The Hollywood Reporter reported.

Harriet, who may also appear in the third installment of the franchise subtitled "The Death Cure," is the leader of a group of girls who have escaped from another maze that meets up with Thomas' (Dylan O'Brien) gang.

Emmanuel can be seen next in "Fast & Furious 7," in which she plays Megan. The James Wan-directed movie is slated for an April 3, 2015 release.

Emmanuel is not the only "Game of Thrones" star that will appear in "The Maze Runner" sequel.  Last month, it was announced by The Hollywood Reporter that Aidan Gillen, who plays Petyr "Littlefinger" Baelish on the TV adaptation of George R.R. Martin's novel series "A Song of Ice and Fire," is also part of the cast.

The 46-year-old Irish actor will play Janson, also referred to as Rat-Man, who becomes the "main antagonist" of James Dashner's young-adult post-apocalyptic science fiction trilogy, in which the film series is based. Though THR describes Janson as "villain," fans who have read the books know that the description is not accurate, according to MTV News.

In the novel trilogy, Janson is a liaison for WICKED (World In Catastrophe: Killzone Experiment Department), the organization that set up the deadly Glade from the first installment, and the creator of the titular Scorch Trials for the purpose of finding a cure for the so-called The Flare.

As of Tuesday, Oct. 21, "The Maze Runner" has already grossed $91.3 million in the US and $160.7 in international markets, according to Box Office Mojo.

And due to the movie's successful box office opening, 20th Century Fox quickly gave the sequel a release date of Sept. 18, 2015.

Wes Ball, who directed the first film, will also helm the sequel from an adapted script penned by Noah Oppenheim. Filming for the second installment is scheduled to start in November.

Aside from O'Brien, Thomas Brodie-Sangster (Newt), Kaya Scodelario (Teresa), Will Poulter (Gally) and Patricia Clarkson (Ava Paige) are reprising their roles in the sequel, according to