Rebecca Romijn, 52, will officially return as Mystique. She starred as the shapeshifter in “X-Men, X2: X-Men United,” “X-Men: The Last Stand” and “X-Men: First Class and Joan in The Punisher.”

SuperHeroHype has compiled a list of every actor that has so far been announced as part of the Avengers: Doomsday cast.

It’s unclear just how big a role the X-Men will play in the film, given Marvel still hasn’t properly integrated the mutant team into the cinematic universe yet, but even the actors that have been announced make it sound like the group itself will play a big role in whatever’s going on in the 2026 movie.