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Milly Alcock stars as Kara Zor-El, a.k.a. Supergirl, in the first trailer for Supergirl

Alcock first appeared in the role when she popped up in David Corenswet's Superman movie in summer 2025

Supergirl is in theaters June 26

"I, Kara Zor-El, hereby declare that 23 will be the best year yet," Milly Alcock ’s Supergirl says in the first trailer for the anticipated superhero movie.

After David Corenswet 's debut as Superman on the big screen earlier this year, Alcock , 25, is playing the iconic superhero's cousin in the new DC Universe.

On Thursday, Dec. 11, Warner Bros. released the trailer for Supergirl . Set to the rock song "Call Me" by Blondie, the trailer opens with a hilarious appearance from Krypto the Superdog .

Kara appears to be having a rough time

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