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J.K. Rowling has asked Harry Potter fans to wish his son "good luck" for his first day at Hogwarts School of Witchcraft and Wizadry.

According to the saga's timeline, today's the day that James Sirius Potter will be charging through to Platform 9 and 3/4 at King's Cross station in London to embark on the magical journey.

The book's author - who is adding to her world on the big screen with prequel Fantastic Beasts and Where to Find Them - has sent fans into a frenzy as she took to Twitter to wish him all the best.

Brilliantly, she tweeted: "I'm in Edinburgh, so could somebody at King's Cross wish James S Potter good luck for me? He's starting at Hogwarts today. #BackToHogwarts"

As fans of the books and films know, Harry Potter's son - who he named after his dad James, and godfather Sirius Black - was due to start school on this very date.

It has sent the internet into something of a meltdown, with tweets of support and messages from fans wishing they were starting their own adventure today.

One wrote: "Enjoy the next seven years of your life, James S. Potter. Ain't it grand? A new generation of witches and wizards! @pottermore @jk_rowling"

Another exciter user added: "Good luck James S. Potter. I'll see you at the platform!"

We wonder if Harry and Ginny will be there to wave him off?

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