The original Professor X and Magneto - Sir Patrick Stewart and Sir Ian McKellen - will return in Bryan Singer's "X-Men: Days Of Future Past."
"I'd like to officially welcome back James McAvoy, Jennifer Lawrence, Michael Fassbender, & Nicholas Hoult to #XMEN for #DaysOfFuturePast," the director Tweeted on Tuesday.
Followed by another Tweet sure to delight mutant-loving fans everywhere.
"Thrilled to announce @ianmckellen118 & @SirPatStew are joining the cast of #XMEN #DaysOfFuturePast #magneto #professorX More to come..."
But how will the original X-Men actors star alongside the younger versions of themselves - played by James McAvoy and Michael Fassbender -- in the sequel to "X-Men: First Class"?
The director told Deadline, "The movie is called 'X-Men: Days Of Future Past', use your imagination."
Last month, Famke Janssen, who played Jean Grey in the first three "X-Men" movies, teased that her character could also rise from the ashes.
"One never knows," she told MTV. "Jean Grey, the Phoenix... she finds a way to reincarnate herself constantly, so one never knows."
"X-Men: Days Of Future Past" is slated to hit theaters in summer 2014
Copyright 2012 by NBC Universal, Inc. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.