Ezra Miller's Barry Allen/Flash just came face-to-face with Grant Gustin's Barry in the midst of CW's "Crisis on Infinite Earths" crossover.
The cameo occurred during Tuesday's Arrow episode of the five-part tale - bringing Miller (complete in his movie costume) into S.T.A.R. Labs and into conversation with Gustin's core CW Barry.
Here's the clip courtesy of We Got This Covered:
This is the first time a current DCEU film character has appeared on CW - and even with the crossover's unprecedented inclusion of alt-versions of Superman, Batman, and others played by their classic actors, sets an interesting tone for the future of the DC Universe on the small and big screens.
Miller's The Flash movie was recently scheduled for a July 1, 2022 release date by Warner Bros., directed by IT's Andy Muschietti.