Harry Potter TV show trailer: Everything we know so far

The first trailer for the forthcoming Harry Potter TV series has been released.

Here is everything we know so far about the HBO reboot, which is a spin-off from the original books and the subsequent film franchise.

Wednesday's two-minute video takes us all the way from the Dursleys' - including a shot of Harry in his famous cupboard under the stairs - to Hogwarts.

It gives us our first glimpse of Uncle Vernon and also Aunt Petunia, who can be heard telling her nephew there is "nothing special" about him just as his Hogwarts letter arrives.

We're then shown Hagrid shepherding Harry across London to King's Cross Station to catch the iconic Hogwarts Express.

And while we don't get a real view of platform nine-and-three-quarters, we do get some real Potter sights: the lightning scar, the circular glasses and a flash of red hair as Harry spies the Weasleys through the train window.

After we reach Hogwarts, we get our first shots of a whole host of central characters - from Professor Snape to Dumbledore and McGonagall, Draco Malfoy and, of course, Ron Weasley and Hermione Granger.

They really haven't held back on the detail: even the sorting hat and wand-maker Ollivander are in there.

Super fans will be zooming in on the school uniforms, the glimpse of what looks like a common room, and the Quidditch players we see walking out to a snowy pitch in full uniform, brooms at the ready.

Filming is well under way for series one of the new show, which is set to launch on HBO Max in 2027.

But the entire production is expected to take 10 years to complete in total, as the plan is to film a series to cover each of Rowling's seven books, which the films were originally based on.

With that in mind, Warner Bros Studios in Leavesden near Watford, where it is being made, was last summer granted permission to build a temporary school for the child actors to study in for real, when they're not at Hogwarts.

More than 30,000 children auditioned after an open casting call. The chosen ones - Dominic McLaughlin, Arabella Stanton and Alastair Stout - are all relative newcomers.

McLaughlin will star as the titular wizard opposite Stanton as Hermione and Stout as Ron.

The young cast also includes Lox Pratt as Draco Malfoy, Alessia Leoni as Parvati Patil and Leo Earley as Seamus Finnigan. Rory Wilmot will play Neville Longbottom and Amos Kitson is portraying Dudley Dursley.

They will be joined by adult stars including John Lithgow as Dumbledore, Janet McTeer as Minerva McGonagall, Paapa Essiedu as Severus Snape and Nick Frost as Hagrid.

Earlier this week, HBO boss Casey Bloys confirmed to Variety that they had not yet cast an actor for the role of Harry's arch enemy Voldemort - portrayed on the big screen by Ralph Fiennes.

Pushed on rumours about Tilda Swinton, he replied: "As a rule, I would say any rumours - don't [believe them]. I don't even know who we're casting."

Author JK Rowling is an executive producer on the series, which HBO says will be a "faithful adaptation" of her books.

Some cast members have spoken about facing criticism for taking part from those who are opposed to Rowling's views on trans rights.

Lithgow recently told the New York Times he almost pulled out of playing Dumbledore over the backlash.

"Every interview I will ever do for the rest of my life, this will come up," he said.

Speaking to Deadline last year, Hagrid actor Frost said he did not agree "in any way" with Rowling's views on the matter.

"She's allowed her opinion and I'm allowed mine, they just don't align in any way, shape or form."

Last year, Essiedu was one of more than 400 actors to sign a petition calling for the UK entertainment industry to protect the trans community.

Rowling responded by saying she would not and could not fire actors who disagreed with her. "I don't believe in taking away people's jobs or livelihoods because they hold legally protected beliefs that differ from mine."

Meanwhile, Essiedu has told the Sunday Times he has received death threats from racist trolls who think a black actor shouldn't play Snape.

Bloys told Variety the producers had installed "serious security" on set as a result of such threats.

"With all actors on any kind of big IP shows - and this is obviously one of those where you've got passionate fans, people with a lot of opinions - it can get scary in places," he said.

Not that we know... unless he used his wizardry skills to sneak in unnoticed.

But he has written to the new Harry Potter.

The original star of the decade-long noughties movie franchise, now 36, revealed in November that he had sent a letter to McLaughlin, who then sent a "very sweet note back".

Radcliffe told Good Morning America he had written directly to McLaughlin after the child star was cast in the lead role.

McLaughlin's predecessor - who was also 11 when he began work on the first Harry Potter movie - wished the youngster and his co-stars all the best for the production, saying: "I just want to hug them."

He added: "I don't want to be a spectre in the life of these children but I just wanted to write to him to say, 'I hope you have the best time, and an even better time than I did - I had a great time, but I hope you have an even better time'.

"And I do, I just see these pictures of him and the other kids and I just want to hug them."

He added: "They just seem so young. I just look at them and say, 'Oh it's crazy I was doing that at that age.' But it's also incredibly sweet and I hope they're having a great time."