Famke Janssen played Jean Grey in the first trilogy of X-Men movies, but she doesn't think she'll be coming back for anymore… unless someone wants her to.
At a panel at Denver Comic Con, as recapped by ComicBook.com, Janssen said that she's done with the X-Men franchise:
"I think we're done, but it was really great while it lasted and it lasted for a long time. It's been nothing but a pleasure working not just as Jean Grey, which was such an honor because comics were so fantastic already, but then the entire cast who I got to play with, all my fellow actors, thespians who are so talented. It was just a wonderful experience. I'm very grateful."
Though Janssen's character was killed off almost as thoroughly as viewer's brain cells in Brett Ratner's 2006 masterpiece, X-Men: The Last Stand, she reprised her role in cameos for The Wolverine and X-Men: Days Of Future Past. Currently, Game of Thrones star Sophie Turner plays Jean Grey in the franchise.
Janssen appreciated the experience of playing Jean:
"That was so amazing. I never knew – I don't think any of us had any understanding of how popular our first movie was going to be and that it was gonna live on for 15 plus years. And then I certainly didn't realize – I mean I knew Jean Grey could turn into Dark Phoenix, obviously, and that Phoenix rises from the ashes, but the fact that as Jean Grey or the Phoenix they've killed me, I've come back, I'm like a cockroach. They can't get rid of me."
Ultimately, Janssen revealed that there was one condition under which she'd consider reprising her role: that someone asks her to.
"Jean Grey is a part of me. I would definitely come back to play her whenever they ask me."
With 2018's X-Men: Dark Phoenix revisiting the storyline that ended Janssen's run as the character in 2006, maybe a cameo is in order.