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Supergirl to Stream Exclusively on HBO Max Sept. 10

WarnerMedia is consolidating DCU releases on its streaming service to broaden audience reach and to gauge Supergirl’s streaming performance for future franchise planning.

Image: Warner Bros. Pictures
Supergirl: HBO Max Release Date Revealed For DC Studios Movie With Just 53% On Rotten Tomatoes
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Overview

  • The film will stream exclusively on HBO Max starting Thursday, Sept. 10, 2026, with an HBO linear premiere on Saturday, Sept. 12 at 8 p.m. ET and a 4K physical release arriving around Sept. 8.
  • An American Sign Language version performed by Catalene Sacchetti and directed by Jonaz McMillan will be available on HBO Max the same day to improve accessibility.
  • Supergirl underperformed in theaters, finishing its run with about $126 million worldwide against reported combined production and marketing costs that industry outlets say produced an estimated $100 million to $120 million loss.
  • The movie drew mixed to negative reviews — critics give it a low Rotten Tomatoes score while audience polling returned a B-minus CinemaScore — even as reviewers and outlets praised Milly Alcock’s lead performance.
  • DC Studios produced the Tom King adaptation under James Gunn and Peter Safran, and Milly Alcock is confirmed to reprise Supergirl in Superman: Man of Tomorrow, a factor that makes the streaming window important for measuring fan interest.