‘Supergirl’ Teaser Trailer Gives Milly Alcock’s Kara Zor-El the Spotlight

The DC Universe is opening the door to a wild, messy Kryptonian. Warner Bros. has unveiled the official teaser trailer for Supergirl, with Aussie star Millie Alcock (House of the Dragon) playing a rougher hero who’s far less interested in living up to her cousin’s reputation. Yes, after her quick appearance in Superman, it’s time for Kara Zor-El’s chapter. Watch the teaser above, then read on for everything it reveals.

A rock-and-roll Supergirl steps into the spotlight

Soundtracked to Blondie’s “Call Me”, the teaser wastes no time setting its tone. This is Kara Zor-El at her most unpolished: hungover, emotionally guarded, and openly sceptical of the heroic ideal Superman embodies. “He sees the good in everyone,” Kara says in the teaser. “I see the truth.”

The contrast is deliberate. Australian director Craig Gillespie (I, Tonya, Cruella, Lars and the Real Girl) has described the film as being shaped by Kara’s flaws rather than her powers. “Supergirl, as she’s written, has a lot of demons, a lot of baggage, and she’s not dealing with it at the beginning of the film,” the filmmaker said at a press conference, as quoted by The Screen Brief. “It’s a wonderful place for an actor to start, to be able to draw on that and be broken in that way and figure it out. That’s what really drew me to this.” That edge is all over the teaser, from Kara’s weary detachment to the irreverent moments that undercut the mythic image of a Kryptonian saviour.

A revenge quest across the galaxy

Inspired by Tom King and Bilquis Evely’s limited comic series Supergirl: Woman of Tomorrow, the film follows Kara as she travels across the galaxy to mark her 21st birthday alongside Krypto the Superdog. That celebration quickly turns darker when she crosses paths with Ruthye Marye Knoll (Eve Ridley), a young woman seeking revenge against the murderous Krem of the Yellow Hills (Matthias Schoenaerts).

The teaser hints at that chaotic journey without spelling too much out. Among the snippets on offer: the scene-stealing Superdog that is Krypto, the destruction of Krypton (“Krypton didn’t die in a day,” Kara says. “The gods are not that kind.”), interactions with Ruthye Marye Knoll, a blink-and-you’ll-miss-it glimpse of Jason Momoa’s Lobo, and more than a few shots that bring James Gunn’s Guardians of the Galaxy films to mind. As a DC Studios head alongside Peter Safran, Gunn, of course, serves as producer here.

Cast, creators, and where this fits in the new DCU

Alongside Alcock, the film stars Ridley, Schoenaerts, Momoa, David Krumholtz as Zor-El, Emily Beecham as Alura In-Ze, and Alice Hewkin as a Sklarian Raider. The screenplay comes from Ana Nogueira, who has also had a career as an actress, with roles in The Michael J. Fox Show and The Vampire Diaries, among other projects.

Gunn has been clear about what sets this version apart, saying at the press conference, “One of the cool things to me about the movie is that most of the movies we’ve had with female-led heroes have been pretty much like the perfect bad-arses, and Supergirl is not that.” Back in July, he described the film to Rolling Stone as “a way more rock & roll film. It’s a little bit rougher, in certain ways. She’s a tougher character. She’s not Superman at all. And so it’s not the same. [Superman] really is for everybody. And so is Supergirl, but it’s a little bit edgier in some ways than [Superman].”

Supergirl opens in Australian cinemas on June 25 and U.S. cinemas on June 26, 2026.

Warner Bros.

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