Supergirl Hits HBO Max September 10 — Here's the Full Theatrical-to-Streaming Timeline

DC Studios’ Supergirl begins streaming on HBO Max on September 10, 2026. That isn’t the movie’s first home release: Milly Alcock’s DCU film has already been available to rent or buy digitally since July 28, with physical editions arriving September 8 before its subscription-streaming debut.

The Complete Release Timeline

• June 26, 2026 — Theatrical release
• July 28, 2026 — Digital purchase/rental debut in North America, on participating platforms including Amazon Prime Video, Apple TV and Fandango
• September 8, 2026 — 4K Ultra HD, Blu-ray and DVD release, also scoped to North America per Warner Bros.’ own announcement
• September 10, 2026 — HBO Max subscription-streaming debut, alongside a dedicated ASL version
• September 12, 2026 — HBO linear premiere at 8 p.m. ET

Digital Rental/Purchase vs. HBO Max: What’s the Difference?

The confusion around “is Supergirl already streaming” comes down to one distinction. Since July 28, Supergirl has been available digitally as a separate purchase or rental — you pay per title, through Amazon, Apple TV, Fandango or similar platforms. HBO Max is different: starting September 10, the film is included as part of an HBO Max subscription, with no separate purchase required. September 10 isn’t the movie’s first home release or the first time anyone could watch it outside a theater — it’s the date it becomes available through streaming access rather than a one-off purchase.

Supergirl Gets a Dedicated ASL Version

Warner Bros. Discovery is also releasing a full American Sign Language version of Supergirl on HBO Max the same day, September 10. It’s a distinct presentation of the film, not standard subtitles — performed by Catalene Sacchetti (“Songs in Sign Language”) and directed by Jonaz McMillan (“The Pitt with ASL” Season One).

HBO Linear Follows September 12

Two days after the HBO Max debut, Supergirl premieres on the HBO linear channel on Saturday, September 12, at 8:00 p.m. ET. That’s a separate date from the HBO Max streaming debut, not a typo or duplicate listing — subscribers without HBO Max access, or anyone tuning in the traditional way, get the film on linear specifically that Saturday night.

What “Global Streaming Debut” Means

Warner Bros. Discovery’s own wording is that Supergirl will make its “global streaming debut exclusively on HBO Max” on September 10. That confirms HBO Max as the film’s worldwide streaming home rather than a US-only rollout, but it doesn’t guarantee identical app availability, timing or regional distribution in every market — HBO Max itself isn’t available everywhere, and WBD’s announcement doesn’t spell out a country-by-country breakdown. Landing on HBO Max also doesn’t mean Supergirl’s theatrical run is being formally cut off; subscription streaming and any remaining limited theatrical showings aren’t mutually exclusive. The film wrapped its main box office run well below expectations, but Warner hasn’t tied the September 10 date to that performance, and neither should anyone reporting on it.

Supergirl stars Milly Alcock as Kara Zor-El alongside Matthias Schoenaerts, Eve Ridley, David Krumholtz and Emily Beecham, with David Corenswet and Jason Momoa. It’s written by Ana Nogueira, directed by Craig Gillespie, and produced by DC Studios heads James Gunn and Peter Safran, drawing on the character’s Woman of Tomorrow comics. Alcock is set to return as Kara in Superman: Man of Tomorrow, and Supergirl remains part of the wider DCU viewing picture heading into the franchise’s next chapter.