On Friday, June 3, the highly-anticpated prequel 'X-Men: First Class,' finally hits theaters, and we know what you're thinking: Who in the world are all of these people? In this 1960s-set prequel, a lot of things are different. No Wolverine! No Storm! Professor X has hair?!

Well, we've got everything you need to know about the main cast (from familiar faces to brand new mutants!), and more after the jump!

(Click through to find out who's who in 'X-Men: First Class')
categories Features, Coming Soon