The X-Men Confirmed for 'Avengers: Doomsday' Thanks to Everyone's Favorite Big Blue Mutant

Marvel Studios has spent the better part of the day announcing the cast for Avengers: Doomsday, one name at a time — much to the chagrin of Marvel fans — but one cast member stands out more than others. Kelsey Grammer has been confirmed to reprise his role as Beast in the 2026 Avengers film after most recently appearing in The Marvels. Grammar’s Beast shows in the post-credits scene for the film after Monica Rambeau (Teyonah Parris) finds herself in another dimension thanks to her effort to close a portal left behind by Dar-Benn (Zawe Ashton). This is the first confirmed member of the Doomsday cast that is not from Earth-616, but he certainly won’t be the last by the time it’s all said and done.