Marvel Unveils Star-Studded Cast for Avengers: Doomsday, Officially Welcoming X-Men Into the MCU

Marvel surprised fans with a livestream unveiling the cast of Avengers: Doomsday, confirming a mix of returning MCU heroes and new additions, including several members of the Fantastic Four and X-Men. Notably, Robert Downey Jr. is returning—this time as the villain Doctor Doom—while Kelsey Grammer reprises his role as Beast, signaling the official integration of the X-Men into the MCU. The film will be directed by the Russo brothers, who see it as a fresh start for Phase 7. The cast reveal builds major hype ahead of the film’s 2026 release and hints at deeper crossovers like Avengers vs. X-Men in the future.

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