Justice League: Inside the Cast's 'Chemistry' — and the Most 'Unforgettable' Moment from Set

The Justice League goes through some serious growing pains before they finally learn how to work together, but the cast behind the superheroes bonded with each other quick as a flash.
“The chemistry between the cast was better than we could have imagined,” producer Chuck Roven tells PEOPLE of the star-studded ensemble film. “They completely connected both on and off the set.”
The cast, who posed for the exclusive PEOPLE photo above, includes Ezra Miller as the Flash,