Supergirl 2026 Trailer Drops: First Look at Milly Alcock as Kara Reveals Gritty, Guardians-Style DCU Reboot

DC Studios has officially released the first full trailer for Supergirl (2026), giving fans their first in-motion look at Milly Alcock as Kara Zor-El. Dropping today, December 11, 2025, the trailer sets the tone for a bold reimagining of the iconic hero—one that leans heavily into cosmic world-building, gritty tone, and a style many viewers are calling “Guardians of the Galaxy meets DC’s darker edge.”

Arriving in theaters June 26, 2026, the film is the second theatrical installment in James Gunn and Peter Safran’s new DC Universe slate.

Milly Alcock Makes Her DCU Debut

Alcock, best known for her breakout role in House of the Dragon, steps into Supergirl’s suit with intensity and emotional weight. Today’s trailer highlights a far harsher upbringing for Kara than previous versions. Raised in the remnants of a dying Krypton, Kara arrives in the DCU not as a beacon of hope—but as a survivor shaped by trauma, conflict, and loss.

The early footage features Alcock in a sleeker, darker Supergirl suit with muted color palettes and moody cinematography. Fans immediately noticed the contrast with the brighter, more optimistic Superman film released earlier this year.

A Space Fantasy With Guardians of the Galaxy Energy

Director Craig Gillespie—known for Cruella and I, Tonya—puts a distinctive stamp on the DCU, steering Supergirl into cosmic, character-driven storytelling. The trailer features sweeping shots of alien landscapes, multi-species battles, and stylized action sequences reminiscent of Guardians of the Galaxy, but with a more grounded emotional core.

James Gunn previously described the film as a “space fantasy adventure,” and the trailer confirms that tone. Kara’s journey spans multiple worlds as she partners with Ruthye Marye Knoll, a fierce young warrior seeking justice for her father’s death.

Meet the Cast Bringing Supergirl’s Universe to Life

Schoenaerts’ portrayal of villain Krem brings brutality and tension, while Jason Momoa’s highly anticipated turn as Lobo adds an unpredictable antihero presence to the story. Eve Ridley’s Ruthye serves as Kara’s emotional anchor and mission partner.

Craig Gillespie’s Darker, Grittier Vision for DC

Gillespie emphasizes that this is not a traditional superhero origin story. Instead, Supergirl is framed as a story of survival, identity, and vengeance. The tone is darker than fans may expect, shaped by Krypton’s collapse and Kara’s fight to find her place in the universe.

The trailer also confirms that composer Ramin Djawadi (Game of Thrones, Iron Man) is scoring the film, adding to the epic scale of the new footage.

What Fans Can Expect From the Full Trailer

Today’s reveal includes:

• Extended shots of alien worlds

• Kara’s combat-heavy escape sequences

• First glimpses of Lobo

• Emotional dialogue between Kara and Ruthye

• High-energy action sequences with cosmic backdrops

With DC aiming for a fresh identity, Supergirl appears poised to become one of the most visually ambitious films in the upcoming DCU lineup.