Plot Synopsis Revealed for DC’s Upcoming Supergirl Film Starring Milly Alcock

The first plot details for DC’s Supergirl, starring Milly Alcock in the titular role, have been revealed. The film is described as a “murderous quest for revenge” story, based on Tom King and Bilquis Evely’s 2021 comic book mini-series Supergirl: Woman of Tomorrow.

What is the plot of Supergirl?

While celebrating her 21st birthday, Kara Zor-El (Milly Alcock), feeling lost and purposeless, travels across the galaxy with her dog Krypto. Along the way, she meets Ruthye Marye Knoll (Eve Ridley), a young alien girl seeking revenge on the warlord Krem (Matthias Schoenaerts), who killed her father. Their journey takes Kara to a planet with a red sun, stripping her of her powers and forcing her to discover what it truly means to be a hero without her superhuman abilities.

Following the wrap in May 2025, the film entered post-production. Supergirl had a rough cut screening in August, which was well received.

Below, you can see the poster of Supergirl, featuring the tagline “Look Out” instead of “Look Up.”

Directed by Craig Gillespie, from a screenplay by Ana Nogueira and based on the comic by Tom King and Evely, the film will serve as the second entry in the DC Universe and the fourth installment of Chapter One: Gods and Monsters.

During The Howard Stern Show, DC Studios boss James Gunn said Milly Alcock might be the best casting he’s ever done.

Gunn stated: “Supergirl, the movie, we’re editing it right now. Milly Alcock, who plays Supergirl, might be the best bit of casting I’ve ever done in my entire life. I think she’s absolutely stunning in the movie.”

The film stars Milly Alcock as Kara Zor-El / Supergirl, Matthias Schoenaerts as Krem of the Yellow Hills, Eve Ridley as Ruthye Marye Knoll, David Krumholtz as Zor-El, Emily Beecham as Alura In-Ze, and Jason Momoa making a cameo appearance as Lobo.

James Gunn and Peter Safran are producing the film, with DC EVP Chantal Nong serving as the executive producer.

Supergirl will hit theaters in the United States on June 26, 2026, by Warner Bros. Pictures.