AceShowbiz - The movie Supergirl starring Milly Alcock has opened with modest box office returns and is not yet regarded as a success. Warner Bros. has set a target for the film to gross $300 million worldwide to be considered a hit.

Opening on June 29, 2026, Supergirl earned $7.8 million domestically and $5.2 million internationally on its first day, totaling $13 million worldwide. The studio expects a stronger opening weekend in the range of $40-45 million domestically. However, this still falls short of the $50-55 million forecasted by some industry analysts. The production budget was $170 million, excluding marketing costs, with earlier estimates indicating the film needs to reach at least $315 million to break even. Competition from major releases like Toy Story 5 and Minions & Monsters could impact its box office trajectory.

Supergirl is directed by Craig Gillespie and stars Milly Alcock as Kara Zor-El, alongside Jason Momoa, Matthias Schoenaerts, and David Corenswet. The film follows Kara celebrating her 21st birthday and embarking on a cosmic quest after a tragedy involving her dog Krypto. It serves as a follow-up to James Gunn’s 2025 Superman film, which starred David Corenswet and enjoyed a much stronger box office showing with $618 million worldwide gross. The film is part of the ongoing DC Universe franchise overseen by Gunn and Peter Safran.

The movie has received mixed reviews, holding a 57% score on Rotten Tomatoes, with praise for Milly Alcock’s portrayal of Kara and Jason Momoa’s entertaining role as Lobo. Despite the uneven reception, Warner Bros. launched the largest promotional campaign ever for a DC Studios film, involving over 80 partners and generating more than $100 million in media value. Major tie-ins include Kentucky Fried Chicken’s extensive campaign, Ulta Beauty’s Rebel Summer makeup line, and American Airlines’ global flight promotions.

This box office performance matters because Warner Bros. is investing heavily in establishing Supergirl as a tentpole for their DC Universe, with high financial stakes and extensive marketing backing. The film’s ability to meet or surpass the $300 million global mark will be critical in shaping the future direction of the franchise and its place alongside Superman’s successful 2025 launch.