Ready to do some serious hand-flailing? 'Cause you're definitely about to.

So, everyone knows that when it comes to the box office, J.K. Rowling and her "Harry Potter" book-to-screen phenomenon proved to be pure freakin' magic. And while Warner Bros. tried to move on after the "Deathly Hallows" two-parter and make southern gothic witchcraft a viable thing by way of "Beautiful Creatures," the studio is nowhere near ready to give up on the series that apparated (that's Hogwarts speak for summoned in) so many piles of cash for it even Gringott's would need to tighten up security to bank it.

Generous though our magic queen is, she's now signed on to write — that's her actual hand to paper, 'cause that's how she rolls — the screenplays for a new film series about the "Harry Potter" world.

We'll wait a sec while you jump out of your chair and do the happy dance ...

Done? Welcome back.

Okay, so according to The Wrap, which first broke the news, Rowling's new film series will be called "Fantastic Beasts and Where to Find Them" (note: this was one of Harry Potter's textbooks which Rowling also wrote and released for us Muggles to benefit charity) and will tell the story of Newt Scamander, the little chap who authored it.

Rowling stated on her Facebook page, "It all started when Warner Bros. came to me with the suggestion of turning 'Fantastic Beasts and Where to Find Them' into a film. I thought it was a fun idea, but the idea of seeing Newt Scamander, the supposed author of 'Fantastic Beasts', realized by another writer was difficult. Having lived for so long in my fictional universe, I feel very protective of it and I already knew a lot about Newt. As hard-core Harry Potter fans will know, I liked him so much that I even married his grandson, Rolf, to one of my favourite characters from the Harry Potter series, Luna Lovegood."

"Although it will be set in the worldwide community of witches and wizards where I was so happy for seventeen years, 'Fantastic Beasts and Where to Find Them' is neither a prequel nor a sequel to the Harry Potter series, but an extension of the wizarding world. The laws and customs of the hidden magical society will be familiar to anyone who has read the Harry Potter books or seen the films, but Newt’s story will start in New York, seventy years before Harry’s gets underway," she explained.

"Fantastic Beasts" will mark Rowling's first foray — assuming there isn't some secretly ghostwritten script out there all "The Cuckoo's Calling" style — into the screenwriting biz, but the studio's CEO Kevin Tsujijara is not worried about her ability to change pens. "She is an extraordinary writer," he said in a statement, "who ignited a reading revolution around the world, which then became an unprecedented film phenomenon. We know that audiences will be as excited as we are to see what her brilliant and boundless imagination conjures up for us."

This is obviously a big win for Warner Bros., but Rowling credits the studio with presenting and supporting the idea for the series which ultimately drew her back in.

"I always said that I would only revisit the wizarding world if I had an idea that I was really excited about and this is it," she said.

We're all winners in this game, that's for sure.