James Gunn, the head of DC Studios and director of "Superman," revealed the first look at the new "Supergirl" movie — with a warning.

Welcome to Derry is finally here, giving fans a new peek at the creepy world of Pennywise. The series will hit HBO this October and serve as a prequel to the It movies that came out in 2017 and 2019.

The first poster for Supergirl has been revealed by DC Studios head James Gunn, warning you to "look out" instead of Superman ...