X-Men: Days of Future Past Movie Clip - Who Are You?

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In this clip from X-Men: Days of Future Past, when other mutants are at risk, Mystique (Jennifer Lawrence) means war.

The ultimate X-Men ensemble fights a war for the survival of the species across two time periods in X-MEN: DAYS OF FUTURE PAST. The beloved characters from the original X-Men film trilogy join forces with their younger selves from X-Men: First Class in an epic battle that must change the past -- to save our future.

X-MEN: DAYS OF FUTURE PAST opens in 2D and 3D on May 23.