Fantastic Beasts: The Crimes of Grindelwald may not open for another five months, but Harry Potter creator J.K. Rowling is already hard at work on its sequel.

In the latest responses on her website to fan questions, Rowling confirmed she's writing the third Fantastic Beasts screenplay.

RELATED: Rowling Understands If Fans Boycott Fantastic Beasts 2 Over Depp's Role

"I’ve just finished the fourth Galbraith novel, Lethal White, and I’m now writing the screenplay for Fantastic Beasts 3," she posted. "After that I’ll be writing another book for children. I’ve been playing with the (non-Harry Potter/wizarding world) story for about six years, so it’s about time I get it down on paper."

Originally envisioned as a prequel trilogy establishing the wizarding world of Harry Potter, Fantastic Beasts has been expanded by Warner Bros. to five films. Each will be written by Rowling, with Harry Potter veteran David Yates confirmed to direct.

RELATED: French Word For Muggle Sounds Better Than "No-Maj"

In her post, Rowling also clarified her role as producer, writing, "Warner Bros and David Yates, the director, have always let me have my say, though not necessarily the final word. That’s true of all the producers, of whom I’m only one: our input is taken seriously but it is very much a collaborative effort. The director is ultimately responsible for everything that’s seen on the screen. As the screenwriter, the majority of my input comes at an earlier stage."

Arriving Nov. 16, Fantastic Beasts: The Crimes of Grindelwald is directed by David Yates, with J.K. Rowling, David Heyman, Steve Kloves, and Lionel Wigram serving as producers. The film stars Eddie Redmayne as Newt Scamander, Jude Law as Albus Dumbledore, Johnny Depp as Gellert Grindelwald, Katherine Waterston as Tina, Alison Sudol as Queenie, Dan Fogler as Jacob, Ezra Miller as Credence, Zoë Kravitz as Leta Lestrange, and Callum Turner as Theseus Scamander.