10 Actors Who Appeared In Star Trek AND The MCU

8. Kelsey Grammer

Kelsey Grammer has made three appearances as the furry genius of the X-Men, Beast, to date. He first appeared in X-Men: The Last Stand, before a quick cameo at the end of X-Men: Days Of Future Past, and then returned to the blue, albeit with a bit of digital help this time, in The Marvels. This means that before he appears in 2026's Avengers: Doomsday, he has already taken a twirl on the MCU's dancefloor.

Grammer will be known to Star Trek fans as the captain of the USS Bozeman, Morgan Bateson. He was slightly more fresh-faced back in Cause And Effect, all dolled up in his Monster Maroon, unaware of the fact that his ship and crew had been caught in a temporal loop for decades.

Bateson didn't retire, despite absolutely meeting the mandatory years of service. Both he and the Bozeman continued to serve in Starfleet. The Bozeman was name-dropped several more times, as well as making a plot-twisting course correction in Star Trek: Generations. Bateson himself was part of Tuvok's team to clear Captain Freeman's name in Star Trek: Lower Decks.

Grammer's cameo in The Marvels was one of several steps to teasing the arrival of the X-Men in the MCU. It looks as though Doomsday will finally see them truly at home.