Ian McKellen and Patrick Stewart: X-Men stars join Avengers Doomsday cast

The film is set for release in May 2026, with Robert Downey Jr already announced as playing Doctor Doom.

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The film is set for release in May 2026, with Robert Downey Jr already announced as playing villain Doctor Doom.

Sir Ian has not appeared as Magneto since 2014's X-Men: Days of Future Past. Sir Patrick, meanwhile, last reprised his Professor Charles Xavier role in Doctor Strange in the Multiverse of Madness in 2022.

Marvel Studios apparently listed the new movie's cast by posting a video showing a row of chairs with names on the back.

As well as Sir Ian and Sir Patrick, other names included Chris Hemsworth, Tom Hiddleston and Anthony Mackie.