Supergirl, featuring Milly Alcock as Kara Zor-El, officially opened in theaters worldwide on June 26, 2026, as part of James Gunn's DC Universe [1, 2]. The film is directed by Craig Gillespie and written by Ana Nogueira. Alcock previously appeared as Kara in a cameo in the 2025 Superman movie directed by Gunn [1, 2, 3].

The cast also includes Eve Ridley as Ruthye Marye Knoll, Matthias Schoenaerts as the villain Krem of the Yellow Hills, and Jason Momoa as the alien mercenary Lobo [2]. David Krumholtz and Emily Beecham play Kara’s parents, with David Corenswet reprising his role as Superman [2]. The film is rated PG-13 [2].

The story centers on Kara waking from unintended cryo sleep and embarking on a galactic revenge mission tied to a tragedy involving herself and her superpowered dog Krypto [2, 3]. The narrative has drawn criticism for its messy and uneven tone. Critics describe it as a "tale of two movies" that struggles to maintain consistent rhythm or emotional depth [1, 2, 3].

Rotten Tomatoes gave Supergirl a 61% fresh score based on 75 critic reviews after opening at 56% rotten earlier, reflecting mixed reactions overall [2]. Reviewers widely praise Alcock’s performance, finding her portrayal engaging and a highlight of the film [1, 3]. However, many note the movie feels derivative and lacking in emotional weight.

Variety’s Owen Gleiberman said, "Kill Krem! Save the dog! Those are the motivations driving the entire not-even-interesting-enough-to-be-convoluted plot of Supergirl. Maybe that’s why the movie is full of action yet numbingly flat" [2]. David Rooney of The Hollywood Reporter noted the film fails "to find emotional depth in the sisterhood of Kara and Ruthye," despite Gillespie’s history with strong female leads [2]. Slant Magazine’s Rocco T. Thompson called the film "fatiguingly overfamiliar in a genre that can’t help but keep looking backward for inspiration as it clings to relevance" [2].

Supergirl reviews and Rotten Tomatoes scores were released publicly on June 25, one day before the film's worldwide release [2].