This is what Harry Potter nerd-dreams are made of. Emma Watson, Tom Felton, and Matthew Lewis join forces once more and, thankfully, there's proof.

Returning To Hogwarts

Thanks to Felton, who played villainous Draco Malfoy in the world-conquering film series, there's photographic evidence for fans to pore over. He shared a sweet black-and-white snap to Instagram of the three actors cozying up and smiling happily. Lewis played fan-favorite Neville Longbottom, while Watson, of course, played brainy Hermione Granger.

 School mates #hogwartsalumni A post shared by  Tom Felton (@t22felton) on Apr 16, 2018 at 4:33am PDT

"Schoolmates #hogwartsalumni," he captioned the post.

Notably, it seems that the three actors haven't changed at all since their days at Hogwarts. The pic, which featured the two guys in baseball caps and Watson looking effortlessly stunning as usual, quickly racked up over one million likes.

Harry Potter super-fans flocked to flood the comments with heart emojis and gushing messages of nostalgia. There were a couple key cast-members missing from the shot, however, namely Potter himself, Daniel Radcliffe, and Rupert Grint, who played Watson's on-screen paramour, Ron Weasley.

Still A Tight-Knit Group

It's been seven years since the movies wrapped, but the cast remains tight friends. Watson even revealed last year that they still keep a regular group chat going.

Speaking to ET at the premiere of her hit Disney movie Beauty and the Beast, in which she starred as Belle, Watson divulged that the core cast still chats regularly and that they like to keep up with each other's busy careers.

"We actually have a group WhatsApp which invited everyone really from the main cast from Harry Potter to come to the screening. It's a case of trying to, like, get people into the right places, but yeah, everyone has been very supportive and I'm very supported by my old co-stars," she said.

Although Watson took on the iconic role of Belle in the feature adaptation of the classic fairy-tale, she admitted that she found it more difficult than playing Hermione. Being cast as a child shielded her from some of the pressures of taking on such a beloved literary character.

"Playing Hermione when I was a child ... was kind of an 'ignorance is bliss' factor a little bit. Now as an adult, I knew I was bringing to life ... part of people's childhoods and I kind of knew what that was," she explained.

Enjoying Post-Potter Success

The Hogwarts kids have all found fame since Harry Potter ended, with Watson, in particular, becoming a bonafide Hollywood A-lister. As a vocal social justice campaigner, she stepped out of the limelight to pursue an English literature degree from Brown University. This led many to question her commitment to acting.

"It seemed like I was passing up a lot of opportunity. But I needed the space to go and explore who I was, without being under the microscope," she reasoned.

Meanwhile, Radcliffe has moved forward to become an indie darling, appearing in well-received smaller, weirder movies including Swiss Army Man, What If, and Horns. Lewis made a career for himself on TV, in the likes of Happy Valley, Girlfriends, and the BBC's Jack the Ripper thriller Ripper Street.

Felton also starred on TV, in superhero hit The Flash, as well as on the big screen in hit movie Rise of the Planet of the Apes. Grint made an impression in the music video for Ed Sheeran's breakthrough hit Lego House, as well as on TV in Sick Note and Snatch.

It's good to know, though, that Hogwarts still isn't too far away for any of them.

Tags: Harry Potter Emma Watson Matthew Lewis Tom Felton reunion