Supergirl (2026): Cast, Plot, Release Date and Ending

Supergirl (2026) follows Kara Zor-El, a 23 year old Kryptonian who has spent her time partying across space, far from the Earth where her cousin Superman lives. The film, directed by Craig Gillespie, takes its story from the comic Supergirl: Woman of Tomorrow by Tom King and Bilquis Evely, so it plays closer to a western in space than to a standard superhero origin.

The setup begins on the planet Holzherr, where Kara meets Ruthye, a young woman whose family was killed by the outlaw Krem and his Brigands. Ruthye asks Kara to help her take revenge, and Kara says no. Krem then hijacks Kara's ship and shoots her dog Krypto with a poisoned dart, which leaves him only a few days to live. That is the moment Kara changes her mind, because the only way to save Krypto is to find Krem and take the antidote from him. Ruthye comes along for the chase.

If you are new to the series, you do not need to have seen every earlier film. Superman (2025) is the closest companion, since David Corenswet's Superman appears here, but the story stands on its own.

The full plot of Supergirl (2026) is a chase across the galaxy that turns into an argument about revenge. Kara and Ruthye pursue Krem, and Kara fights off a group of raiders along the way. They learn that Krem has gone to Bilquis, where his gang kidnaps young women to be forced into marriage.

On Bilquis, a local husband and wife help them, but the wife tries to drug Kara and hand her over to the gang. The bounty hunter Lobo, who is hunting one of Krem's lieutenants, joins the fight on Kara's side. Kara stops Ruthye from killing Krem, and he escapes and kills the husband and his family. Feeling guilty, Kara goes after him alone.

On Barenton, the planet's green sun drains her powers, and Ruthye finds her and nurses her. Ruthye is later captured and held on the Brigands' ship alongside Lobo, and she frees him before Krem catches her. When the sun turns yellow, Kara recovers, puts on her Supergirl suit and fights the Brigands with Lobo's help. The kidnapped women are freed.

Kara tells Ruthye that killing Krem will not take away her pain, and Ruthye walks away. Kara then kills Krem herself with his sword, takes the antidote and saves Krypto. She invites Ruthye to finish celebrating her birthday week, and then returns to Earth to meet Superman.

Supergirl (2026) was released in US and UK theaters on June 26, 2026, and in Australia on June 25, 2026. The US date is confirmed by The Numbers and the UK date by the Warner Bros. UK site, while the Australian date is reported through TMDB.

DC Studios announced the release date in May 2024. No premiere date, city or venue has been confirmed for the film. In the US it carries a PG-13 certification, in the UK 12A and in Australia M, so it is not rated R.

For streaming, the film is on HBO Max in the US, UK and Australia, with rental and purchase options elsewhere. The superman where to watch page covers the rest of the series.

In the ending of Supergirl (2026), Kara kills Krem, takes the antidote to save Krypto, and returns to Earth to reunite with Superman in Metropolis. Before she leaves, Kara asks Ruthye to stay for the rest of her birthday week, so the revenge plot closes first and the franchise plot second.

The killing is the scene that decides how the film reads. Kara tells Ruthye that killing Krem will not take away her pain, Ruthye walks away, and Kara then kills Krem herself with his own sword. In my reading, that is the film's sharpest choice: Kara earlier stopped Ruthye from killing Krem on Bilquis, and Krem answered by murdering the husband and his family. Her speech on the Brigands' ship carries that guilt, so the kill is less a betrayal of her argument than an admission that mercy had already cost lives. That is opinion, and the film does not spell it out.

The Barenton sequence sets up the farewell. The green sun strips Kara's powers and Ruthye nurses her, which reverses their roles from Holzherr. The invitation to finish the birthday week repays that debt, and it lets Ruthye leave the story with a choice of her own after Kara took her revenge from her.

The final scene is the franchise link. Kara tells Superman she wants to stay and calls Earth her home, which sets her up to appear alongside him in later DC Universe films. Superman (1978) opened the release order as a main entry; Supergirl (2026) is the eighth film and the first spin-off, and it ends by handing back to the main line, with David Corenswet's Superman from Superman (2025) waiting at the apartment. That being said, the next confirmed film in the series is Man of Tomorrow, set for July 9, 2027, so any shared appearance remains a setup, not a promise.

The production history adds context. DC Studios took over post production after a late 2025 test screening, and the released cut is 11 minutes shorter than Craig Gillespie's version, according to Wikipedia. What those minutes contained has not been published, so the pacing of the final act cannot be tied to any specific cut.

Supergirl (2026) has no post credit scene; the Metropolis reunion is the last story beat. If you stayed in your seat for a stinger, there was none to find.

Supergirl (2026) was filmed mainly at Warner Bros. Studios Leavesden in England, with location work in London and Scotland. Principal photography began on January 13, 2025 at Leavesden and wrapped on May 10, 2025, with the Scotland shoot finishing on the final day.

Supergirl (2026) was first announced as Supergirl: Woman of Tomorrow, and its title was shortened in June 2025. The original title matches the comic by Tom King and Bilquis Evely that the film adapts.

• Two composers were attached before Claudia Sarne: Ramin Djawadi, then Tom Holkenborg.
• DC Studios took over post production after a late 2025 test screening, and the released cut is 11 minutes shorter than Craig Gillespie's version.