引用:

James McAvoy as Professor Charles Xavier / Professor X : The telepathic leader and founder of the X-Men and one of Magneto's best friends until conflicts of opinion create a rivalry between them and their teams.[6] McAvoy admitted that he did not read comics when he was a kid, but added that he was a fan of the cartoons from the age of 10. While he describes the older Charles Xavier as "a monk... a selfless, egoless almost sexless force for the betterment of humanity and mortality," he says that the younger Xavier is a very different person, "It's quite fun because the complete opposite of that is an ego-fueled, sexed up self-serving dude. And not going too far with it, but he's definitely got an ego and he's definitely got a sex drive as well."[7] McAvoy admitted he felt that there was a comparison between Professor X/Magneto and Martin Luther King Jr./Malcom X stating, "A lot of the time... in the comic books, Erik comes and goes; he goes back and forward really in what he believes and how he is going to achieve it. And in this film it's sort of like meeting them at a point where they are still finding out who they are and you are still seeing some of the events that shaped them, not through their early life, but some of the key events in the sort of equal rights or civil rights struggle that helped shape them."[8]
Laurence Belcher as Charles Xavier (12 Years)[9]
Michael Fassbender as Erik Lehnsherr / Magneto: The leader and founder of the Brotherhood of Mutants and one of Professor X's best friends until conflicts of opinion create a rivalry between them and their teams.[10] Fassbender said that Matthew Vaughn saw him in an audition for one of his other films and just thought that he would be right for this film. After Fassbender read the script, he said he liked it and then he tried to convince the producers that he was right for the part. When reading Magneto's history (he admitted that he did not know that much about the X-Men) he said to himself that he thought the story was going to be really interesting work. When asked if he was a good guy or bad guy at this point he said that he doesn't really think in those terms. He saw Erik as a Machiavellian character. Fassbender also admitted to watching Ian McKellen's performances to get a flavor of what Magneto was like (while also stating that he liked it) but decided to "paint a new canvas" of the character, stating, "So I did my homework and preparation and you want to respect what someone else has done, especially because the fan base really liked what Ian McKellen has done with it. But while I could have gone and studied him as a young man and brought that to the performance, I don't think Matthew is very interested in that. So I'm just going my own way and working with whatever is in the comic books and the script."[11]
Bill Milner as Young Erik Lehnsherr[12]
Kevin Bacon as Sebastian Shaw: A scientist and the leader of the Hellfire Club, a secret society bent on taking over the world.[13][14] Shaw is a mutant who can absorb kinetic and radiated energy and redirect it.
Jennifer Lawrence as Raven / Mystique: A shape-shifting mutant and Charles Xavier's childhood friend