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The second DC Universe movie is out now in theaters — here's my prediction for when it'll come to HBO Max

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Milly Alcock (left) stars as Kara Zor-El in one of 2026's many new movies (Image credit: Warner Bros. Pictures/DC Studios)

Supergirl has finally taken flight in theaters — and, if you're weighing up whether to see it, read my Supergirl review first to find out if it's worth doing so.

If you've already made up your mind about not seeing the DC Universe (DCU) movie on the big screen, though, you might be wondering when it'll be available to watch at home.

So, when might the Milly Alcock-fronted superhero film make its streaming debut? Below, I've offered my thoughts on its possible HBO Max release date, so read on to see when it might come to one of the world's best streaming services.

Supergirl and Krypto's first joint big-screen adventure will drop on HBO Max later this year (Image credit: DC Studios/Warner Bros. Pictures)

No. One of this year's many new movies only landed in theaters globally on June 26, so it'll be a while before it airs on Warner Bros. Discovery's (WBD) streaming platform.

That said, we can use some recent examples of WBD movies releasing on HBO Max to take an educated guess at when it may join the service's library.

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For starters, Superman, the first DCU Chapter One flick, dropped on HBO Max on September 19, 2025. That means it came to the platform exactly 70 days after its initial theatrical release on July 11, 2025.

Ruthye is one of many supporting characters you'll see in Supergirl (Image credit: DC Studios/Warner Bros. Pictures)

If Supergirl follows in Superman's footsteps, it would make its HBO Max bow on September 4, 2026 — but, how likely is that to happen?

Well, Warner Bros. movies that have come out this year and are now on HBO Max include Wuthering Heights, The Bride!, and They Will Kill You. Curiously, this trio all launched on the service 77 days their original theatrical release dates.

Should other films yet to launch on HBO Max, such as Mortal Kombat II and Lee Cronin's The Mummy, also arrive 77 days after their theatrical debuts, Supergirl may similarly follow this release pattern, and be available to stream at home on September 11.

However, considering the aforementioned date is when the 9/11 attacks, aka one of the most tragic events in US history, occurred, I'd be very surprised if the movie formerly known as Supergirl: Woman of Tomorrow comes out on that date. My best guess, then, is that Supergirl will make its streaming bow on September 4 or 18.

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Supergirl's first silver screen story in 40 years clocks in at under two hours (Image credit: DC Studios/Warner Bros. Pictures)

Supergirl is one of the shortest superhero films of all time. Indeed, at just one hour and 47 minutes, Kara Zor-El's second-ever standalone film, which includes its end-credits crawl, is certainly on the punchier side.

For those of you with small bladders, though, that means you might only need to take one bathroom break during your screening, if you need to take any at all!

Does Lobo make an appearance in any Supergirl post-credits scenes? (Image credit: DC Studios/Warner Bros. Pictures)

You'll need to read my Supergirl ending explained piece to find out. It goes without saying, but that article is full of spoilers, so only read it once you've seen the DCU flick.

Haven't done so yet, but want to find out more before you do? First, read up on everything you need to know about Supergirl. Then, check out my Supergirl cast and character guide to learn who's joins Alcock in DC Studios' latest film.

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As Tech Radar's senior entertainment reporter, Tom covers all of the latest movies, TV shows, and streaming service news that you need to know about. You'll regularly find him writing about the Marvel Cinematic Universe, Star Wars, Netflix, Prime Video, Disney Plus, and many other topics of interest.

An NCTJ-accredited journalist, Tom also writes reviews, analytical articles, opinion pieces, and interview-led features on the biggest franchises, actors, directors and other industry leaders. You may see his quotes pop up in the odd official Marvel Studios video, too, such as this Moon Knight TV spot.

Away from work, Tom can be found checking out the latest video games, immersing himself in his favorite sporting pastime of football, reading the many unread books on his shelf, staying fit at the gym, and petting every dog he comes across.

Got a scoop, interesting story, or an intriguing angle on the latest news in entertainment? Feel free to drop him a line.

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News, deals, reviews, guides and more on the newest computing gadgets
Start exploring exclusive deals, expert advice and more
Unlock and manage exclusive Techradar member rewards
Unlock instant access to exclusive member features
Get full access to premium articles, exclusive features and a growing list of member rewards