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- Jason Flemyng as Azazel: A mutant who has the ability to teleport, and is also a member of the Hellfire Club.
- Lucas Till as Alex Summers / Havok: A mutant who has the ability to absorb energy and discharge it as blasts.
- Zoë Kravitz as Angel Salvadore: A mutant with dragonfly wings which are tattooed on her body and possesses acidic saliva.