One special appearance is none other than Superman's (David Corenswet) cousin, Supergirl (Milly Alcock). Alcock is taking on the mantle of the Woman of Tomorrow and joins other incredible actresses who've given life to this adored character,

James Gunn, the co-head of DC Studios, released the official first image of House of the Dragon and Sirens breakout Milly Alcock in her Supergirl suit for next year's event film.

Gunn's latest, starring David Corenswet as the Man of Steel alongside co-stars Nicholas Hoult as Lex Luthor and Rachel Brosnahan as Lois Lane, has received rave reviews from fans and critics alike. So, naturally, the question on everyone's mind is, “when is Supergirl coming out?”