It's time to watch the Harry Potter reunion online. The reunion lives up to the hype with candid interviews with all the stars and great behind-the-scenes snippets.

HBO Max is hosting the 20th anniversary of Harry Potter: Daniel Radcliffe, Emma Watson, Rupert Grint, and other key cast (and crew) will appear. However, streaming services to watch the Harry Potter reunion depend on where you are.

The Harry Potter reunion celebrates the 20th anniversary of the release of "The Sorcerer's Stone," which, like all of the Harry Potter films, is available sequentially on HBO Max. In 2001, Radcliffe, Watson and Grint were wand-wielding children. Now, they are grown men and women, with acting careers on the line. They gather again to reminisce about the film franchise that changed their lives and had a profound impact on viewers around the world.

The main trio includes Helena Bonham Carter, Robbie Coltrane, Ralph Fiennes, Jason Isaacs, Gary Oldman, Tom Felton, James Phelps, Oliver Phelps, Mark Williams, Bonnie Wright Alfred Enoch, Ian Hart, Toby Jones, Matthew Lewis, and Evanna Lynch join the rest of the cast. Also in attendance will be producer David Heyman and filmmakers Chris Columbus, Alfonso Cuarón, Mike Newell, and David Yates. Author J.K. Rowling will appear in archival footage.

Expect tributes to the late Alan Rickman, Richard Harris, and other deceased film professionals.

Here's what you need to see on the 20th anniversary of Harry Potter: Harry Potter 20th Anniversary: Return to Hogwarts is one of our top picks for new movies and shows to watch this weekend. Also see our guide to cutting the cord in 2022.

In the U.S., Harry Potter 20th Anniversary: Return to Hogwarts will be available on HBO Max.

The special will be delivered on Saturday, January 1 at 3 a.m. ET. The running time is 1 hour and 45 minutes.

As an HBO Max original, Harry Potter Reunion will be available in an ad-supported version on HBO Max. If you haven't signed up yet, give it a try; HBO Max is #1 on our list of best streaming services.

Looking for something else to watch, check out our guide on how to watch RuPaul's Drag Race season 14.

Looking for something else to watch? When the special is over, you can rewatch the Harry Potter movies in order. In other streamers, "Cobra Kai" Season 4 debuts on New Year's Eve, and you can watch "The Book of Boba Fett" right now. On regular TV, get ready to watch "The Bachelor" Season 26, which starts this week.

Canadians can watch "Harry Potter 20th Anniversary": subscribe to Crave and you can watch "Harry Potter 20th Anniversary: Return to Hogwarts."

Crave has a 7-day free trial. After that, the Movies + HBO package is $19.98 CAD per month.

If you are an American traveling abroad and want to use your HBO Max subscription, you need to look into the best VPN service.

Harry Potter fans in the UK can watch the reunion special on Sky and NOW streaming platforms starting Saturday at 8:05 AM JST.

It will also air on Sky Showcase on Saturday at 8 p.m. ET.

The SkyGo app is included with Sky packages and deals; Now Entertainment passes start at £9.99 per month.

Australians can stream the Harry Potter reunion special on Saturdays at 6:01 p.m. ET on Binge.

Binge has a 7-day free trial. After that, the basic plan costs A$10.