Rose Byrne will be rejoining the X-Men cast in the 2016 instalment of the Marvel franchise, X-Men: Apocalypse. The 35-year-old Australian actor played CIA Agent Moira MacTaggert in the 2011 film X-Men: First Class as a potential love interest of James McAvoy's Professor Charles Xaviar. Apocalypse writer, Simon Kinberg, in a recent interview has refused to divulge how Byrne's character will return but promises there's a "rich relationship" with Prof. X to "mine" into.

Rose ByrneRose Byrne will reprise her role as Moira MacTaggert in X-Men: Apocalypse.

Read More: X-Men: Apocalypse Casts Three New Faces.

Speaking to EW, Kinberg stated MacTaggert is "a significant character in the movie." Kinberg, who penned First Class, further explained how Byrne's character, in Apocalypse, is effectively meeting Prof. X for the first time twenty years after their initial meeting. "We ended First Class with Charles having wiped portions of her memory of her experience with the X-Men," Kinberg said. "They are, essentially, strangers to her when she meets them." 

Byrne is not the only member of the X-Men cast to be reprising their roles in the upcoming film as it has been confirmed Jennifer Lawrence, Nicholas Hoult, James McAvoy, Michael Fassbender and Evan Peters will be returning. The film will focus on the younger versions of some of the X-Men characters and a number of younger actors have been cast to play the likes of Scott Summers and Jean Grey in their earlier lives. Sophie Turner (Game of Thrones) has landed the role of Jean Grey and Tye Sheridan (Mud) will play Summers AKA Cyclops. 

Unfortunately there will be two of the X-Men cast missing from the next film as Patrick Stewart and Ian McKellen, who play older versions of Prof. X and Magneto, will not be reprising their roles in Apocalypse

Read More: Patrick Stewart and Ian McKellen Probably Not Reprising Their Roles in X-Men: Apocalypse.

X-Men Days of Future Past
Jennifer Lawrence, pictured here as Raven in X-Men: Days of Future Past, is one of the actors to reprise her role in the upcoming X-Men: Apocalypse.