Supergirl Soars to $18M Debut as Milly Alcock Wins Fans
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Supergirl has officially landed in theaters, and the latest chapter of James Gunn and Peter Safran’s rebooted DC Universe is already one of the most talked-about releases of the summer. The Warner Bros. film, starring House of the Dragon breakout Milly Alcock as Kara Zor-El, flew to roughly $18 million domestically on its opening day from more than 3,600 theaters, putting it on a projected weekend pace in the neighborhood of $50 million. That haul placed the film in second behind Toy Story 5, but the bigger story is the conversation swirling around Alcock’s performance and the daring tone director Craig Gillespie brought to the cosmic adventure.
Adapted from Tom King’s acclaimed comic miniseries Supergirl: Woman of Tomorrow, the movie trades the sun-drenched optimism of a traditional Superman story for something rawer and stranger. Kara is not the polished, fully-formed hero audiences met in last year’s Superman. She is older than her cousin was when his powers emerged, harder around the edges, and carrying the trauma of having watched Krypton die slowly around her as a child. That backstory gives the film its emotional engine and sets up a road-trip revenge tale that sends Kara across the galaxy.
The plot follows Kara as she crosses paths with a young woman named Ruthye on a quest for vengeance, with Krypto the Superdog along for the ride. The pairing gives the film its heart, while the scenery-chewing supporting cast — including Jason Momoa as the bounty hunter Lobo — supplies the spectacle. Gillespie, best known for I, Tonya and Cruella, leans into character over wall-to-wall destruction, a choice that has divided critics but thrilled a sizable chunk of the fanbase looking for something different from the genre.
If there is one point of near-universal agreement, it is Alcock. Reviews that otherwise range from lukewarm to harsh have singled out the 26-year-old Australian actress as the film’s greatest asset. Critics have praised her ability to shift between a fiercely menacing cosmic force, a genuinely funny protagonist, and a deeply vulnerable young woman — sometimes within the same scene. For an actress who first turned heads as the young Rhaenyra Targaryen, Supergirl confirms her as a legitimate leading star capable of carrying a franchise tentpole on her shoulders.
The critical reception overall has been mixed, with the film landing around a 58 percent score on Rotten Tomatoes. Some reviewers called it a shallow blockbuster that never fully takes flight, while others appreciated its willingness to get weird and emotional in a genre that often plays it safe. Audiences handed the film a B-minus CinemaScore, a step below the A-minus that greeted Superman a year earlier, signaling that the more challenging tone may be a tougher sell for mainstream moviegoers expecting a straightforward crowd-pleaser.
Money is the looming question. Supergirl carried a reported production budget of around $170 million, a bit leaner than some recent comic-book spectacles but still hefty enough that the film will need strong legs to turn a profit. Early tracking and the modest opening have prompted some industry analysts to warn that the movie could face a steep climb toward break-even, with the most pessimistic projections floating substantial losses if word of mouth fails to build over the coming weeks.
Comparisons to Superman are inevitable and somewhat unfair. That film opened with the advantage of being the splashy launch of a brand-new cinematic universe, complete with a wave of goodwill and curiosity. Supergirl arrives as a follow-up tasked with proving the DCU can sustain momentum across multiple titles rather than living or dying on a single hit. Its debut pulled in less than a third of Superman’s opening weekend, a gap that has fueled plenty of debate about whether the universe is expanding too quickly or simply telling a smaller, more intimate story by design.
For James Gunn, the stakes extend well beyond a single box-office weekend. As co-head of DC Studios, he has staked his reputation on a carefully mapped slate of interconnected films and series, and Supergirl is an early test of whether audiences will follow the universe into riskier, more character-driven territory. Gunn has long signaled that he wants the DCU to embrace the full range of its comic-book source material, from the bright and heroic to the bleak and cosmic, and Supergirl is arguably the boldest expression of that philosophy so far.
The marketing leaned hard into that ambition. The official trailer emphasized Kara’s edge and the galaxy-spanning scope of her journey, while teasing the unlikely bond between the brooding heroine, the spirited Ruthye, and a scene-stealing Krypto. Momoa’s Lobo, a fan-favorite antihero making his big-screen debut, became an instant talking point the moment footage dropped, with fans dissecting every frame for clues about how the character fits into Gunn’s larger plans.
There has also been off-screen noise. Some remarks from Alcock in the press tour generated headlines and online debate, adding another layer to the discourse surrounding the release. Whether that chatter helps or hurts the film’s commercial prospects remains to be seen, but it has undeniably kept Supergirl trending across social platforms in the days surrounding its premiere — a reminder that in 2026, the conversation around a blockbuster can matter nearly as much as the movie itself.
What happens next depends almost entirely on word of mouth. Superhero films increasingly live or die on their second weekend, and Supergirl will need the fans who connected with Alcock’s performance to become evangelists, dragging friends and family back to theaters before the summer’s crowded slate moves on. A strong hold could reframe the narrative from disappointing opening to slow-burn success; a sharp drop would intensify questions about the direction of the DCU.
For now, Supergirl stands as one of the more fascinating entertainment stories of the summer: a film with a star almost everyone agrees is terrific, a tone that splits the room, and a box-office future that is still very much up in the air. Love it or not, Milly Alcock has announced herself as a genuine leading lady, and the DC Universe has shown it is willing to take swings. Whether those swings connect with enough of the audience to justify the gamble is the question hanging over Kara Zor-El as she takes flight.
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