10 Actors Who Appeared In Star Trek AND The MCU

9. Famke Janssen

Famke Janssen exploded onto screens as Jean Grey in the first X-Men, back in 2000. From there, she appeared in X2, X-Men: The Last Stand, The Wolverine, and X-Men: Days Of Future Past. She has become the definitive cinematic version of the character, though not to disregard Sophie Turner's version in X-Men: Apocalypse and X-Men: Dark Phoenix.

Before she began levitating things with her mind, and dissolving Sir Patrick Stewart (for a while), she was Kamala. Introduced in The Next Generation episode The Perfect Mate, this Kriosian empathic metamorph traveled aboard the Enterprise-D while effectively being sold into a political marriage.

As part of the first theatrical X-Men team, she helped to define the character for a new generation of viewers, many of whom were familiar with the animated version from X-Men: The Animated Series. As Kamala, though stuck as she was in this political position, Janssen brought humour, pathos, and a depth to the role that wasn't necessarily there on the page. Her surprise appearance at the end of X-Men: Days Of Future Past offered a nice coda to her character's arc with Wolverine, though with James Marsden slated to return in Avengers: Doomsday as Cyclops, there is a very good chance Janssen could fly like a Phoenix one more time.