James Gunn has officially unveiled the first poster for his Supergirl movie, and it’s already poking fun at his own marketing campaign. The image features Milly Alcock’s Kara Zor-El hovering ominously above a scratched-out “Look Up” mural—the exact slogan used for David Corenswet’s Superman earlier this year—with “OUT” spray-painted over “UP”. It’s a clever visual gag that establishes Supergirl as the darker, edgier cousin to the Man of Steel, someone you should perhaps look out for rather than up to.
The poster confirms what Gunn has been promising about his new DC Universe: this is not your father’s Superman family. While Corenswet’s Kal-El was presented as a beacon of hope, Alcock’s Kara is being positioned as something more complicated—a Kryptonian who has seen things, who carries trauma and rage beneath her cape, who might not stop to sign autographs after saving a bus full of children. The tagline “Look Out. 2026.” suggests a character who operates on the margins, who arrives like a storm rather than a sunrise.
Milly Alcock, best known for her breakout role as young Rhaenyra Targaryen in House of the Dragon, brings serious fantasy pedigree to the role. Her casting was announced after an exhaustive search that reportedly considered dozens of actresses, but Gunn was adamant about finding someone who could capture Kara’s specific energy—not quite the boy scout Superman, not quite the grim vigilante Batman, but something uniquely her own.
Alcock’s ability to convey both regal bearing and underlying pain in House of the Dragon made her a natural fit for a character who lost her entire world and has been trying to build a new one on Earth.
The film, titled simply Supergirl, is directed by Craig Gillespie (I, Tonya, Cruella) from a screenplay by Ana Nogueira, with a story that promises to take Kara on an “epic, interstellar journey of vengeance and justice”. The official synopsis reveals that when an “unexpected and ruthless adversary strikes too close to home,” Kara reluctantly joins forces with “an unlikely companion” to pursue justice across the stars.
This suggests a road movie structure, a buddy comedy-drama that happens to feature a Kryptonian who can punch through planets.
The supporting cast includes Matthias Schoenaerts as the primary antagonist, Eve Ridley in a key supporting role, David Krumholtz, Emily Beecham, and—perhaps most intriguingly—Jason Momoa. Momoa’s involvement has sparked speculation about whether he’s playing a new character or reprising his Aquaman role in some capacity, though given the cosmic setting, he might be portraying an entirely different DC hero or villain. The film’s interstellar scope suggests connections to the larger DC cosmos, possibly including Green Lantern Corps members or New Gods.
What distinguishes this Supergirl from previous iterations is the direct involvement of James Gunn and Peter Safran as producers, overseeing the film as part of their carefully curated DC Universe Chapter One. This isn’t a standalone project or a leftover from the previous regime; it’s a cornerstone of the new continuity, establishing how Kryptonians fit into Gunn’s vision of a coherent, interconnected superhero universe. The fact that it’s releasing in June 2026, just months after Superman, suggests Warner Bros. is betting heavily on the Kryptonian corner of their mythology.
The poster’s visual language—dark, moody, with Kara’s face obscured—suggests a film that will differentiate itself from the bright, optimistic tone of Superman while maintaining thematic connections. If Corenswet’s film is about what it means to be a hero when everyone expects you to be perfect, Alcock’s film appears to be about what happens when you stop trying to meet those expectations and just start hitting things.
Prepare for takeoff—see Supergirl in theaters June 26, 2026, and discover the darker side of the DC Universe.
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