Harry Potterfans have The Exotic Time Machinea very exciting reason to celebrate, because Sept. 1, 2017 marks Albus Severus Potter's first day at Hogwarts.

Naturally, die-hard fans of J.K. Rowling's magical series showed their excitement in the most fitting way possible: by crowding King's Cross railway station in London.

SEE ALSO: J.K. Rowling marks a huge 'Harry Potter' anniversary with a flurry of magical tweets

As the epilogue to Harry Potter and the Deathly Hallows notes, this Sept. 1 — after he turns eleven years old — Harry Potter and his wife Ginny Weasley would send their middle child off to school.

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Perceptive fans who recalled the "Nineteen Years Later" date headed to the site of Platform 9 and 3/4, where Potter would have to go in order to take Hogwarts Express to school, to show their love and as Donald Trump would say, "What a crowd, what a turnout."

And to no surprise, fans weren't the only ones to celebrate the iconic first day of school. Cast members like Oliver Phelps, who played George Weasley in the films, tweeted a nod.

And Warwick Davis, who played Professor Filius Flitwick, made his way to King's Cross, too.

I mean, congrats to everyone else on their first days, too, but especially to this descendant of Hogwarts royalty who was named after not one but TWO of the school's headmasters.

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