J.K. Rowling's Harry Potter spinoff “Fantastic Beasts and Where to Find Them” will be a film trilogy.

The project, which was originally announced in September 2013, is based on one of the boy wizard’s textbooks, which Rowling penned in 2001 to raise funds for British charity Comic Relief.

Rowling said the movies will be “neither a prequel or a sequel, but an extension of the wizarding world.”

The movies mark Rowling’s foray into screenwriting. Last month Rowling told actress Emma Watson, who played Hermione Granger in the Potter films, that she completed the draft script in 12 days.

"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," said Rowling when the film was announced last year. The trilogy of movies will be produced by David Heyman, who worked on all of the Harry Potter films.

“Fantastic Beasts and Where to Find Them” will be set in New York and follow “magizoologist” Newt Scamander, the fictional author of the guide to magical creatures.

Although little is known about the films, there’s speculation that they’ll follow Newt as he gathers information on magical creatures and writes his famous guide, which classifies 75 beasts from X (boring) to XXXXX (known wizard killer/impossible to train or domesticate).

While fans won’t see any Harry, Ron or Hermione, they may glimpse a familiar face. Albus Dumbledore was a friend of Newt’s and wrote the introduction to “Fantastic Beasts,” so a cameo from a young Dumbledore is a possibility.

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