X-Men: Days of Future Past split posters of Magneto and Professor X

Duality and split personas have been part of superhero cinema for years but usually it’s one actor playing two parts (Superman and Clark Kent, Batman and Bruce Wayne, etc.) not two actors sharing the same character in one film but then again X-Men Days of Future Past is not your typical caped caper.

X-Men "Days of Future Past" poster -- exclusive EW.com image X-Men "Days of Future Past" poster -- exclusive EW.com image

EW.