DC Entertainment has posted a video giving fans a behind-the-scenes look at the Supergirl/Flash crossover episode, Worlds Finest.

A few members of the Supergirl cast and Grant Gustin discuss their impressions of the episode and giddiness ensues as none of them are able to contain their excitement. The BTS video also offers a few shots of never before seen footage from the crossover.

You can check out the recently released trailer below:

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Rejoice, everyone! All of our comic book fantasies will be upon us in a matter of days. The DC Trinity hits the big screen together for the first time tomorrow in Batman v Superman, and Supergirl and The Flash will team up next Monday at 8pm EST on CBS.