In just a little over a year, Avengers: Doomsday will be upon us, which will bring Robert Downey Jr. back to the MCU not as Iron Man, but as the notorious Victor Von Doom. As the title implies, the fifth Avengers movie will see the titular mighty heroes team up with Marvel’s First Family, The Fantastic Four, but that’s not all. Also confirmed to appear are several members of the extraordinary X-Men from the original 20th Century Studios continuity of movies, including Patrick Stewart as Professor X, Ian McKellen as Magneto, James Marsden as Cyclops, Rebecca Romijn as Mystique, Alan Cumming as Nightcrawler, and Kelsey Grammer as Beast (not to mention Channing Tatum‘s Gambit from Deadpool & Wolverine).

For Kelsey Grammer, this actually won’t be the first time he’s stopped by the MCU, given his end-credits cameo appearance in The Marvels. His confirmed casting in Avengers: Doomsday further sets up a lot more to come for Grammer’s brilliant mutant scientist, and according to a new interview with Entertainment Tonight, he’ll be sharing some scenes with the so-called “smartest man alive,” Reed Richards (Pedro Pascal). As one would expect, Grammer will have quite a bit of screentime with his X-Men co-stars, but when quizzed about some of the movie’s cast members whom he hasn’t worked with before, Grammer gave a shoutout to Chris Hemsworth, Downey Jr., and eventually Pascal:

“I really had a great time with the new guy from Fantastic Four. Pedro [Pascal], wonderful guy. I really enjoyed hanging out with him and we worked… together.”

‘Avengers: Doomsday’ Gives Kelsey Grammer the Chance To Reunite With His X-Men Co-Stars (and Work With Some for the First Time)

Because of how memorable Kelsey Grammer’s take on Beast is, it’s hard to believe he’s only really been a major character in only one X-Men movie, and a particularly disliked one at that with X-Men: The Last Stand (although he did have a small cameo in X-Men: Days of Future Past). In the same interview, Grammer further expressed how excited he was to work closely with Patrick Stewart and Rebecca Romijn again, but also to work with James Marsden really for the first time, as Beast and Cyclops didn’t share any scenes together due to the X-Men leader’s death at the hands of the Phoenix (Famke Janssen). The potential for that crossover alone is one of many reasons why Avengers: Doomsday is one of the most anticipated movies of 2026, and it’s only going to get crazier the year after that with Avengers: Secret Wars.

Avengers: Doomsday debuts in theaters on December 18, 2026. Stay tuned to Collider for more updates.