Which film series did J.K. Rowling write the screenplays for beginning with Fantastic Beasts?

J.K. Rowling wrote the screenplays for the Fantastic Beasts film series.

The series began with Fantastic Beasts and Where to Find Them, released in 2016. Rowling wrote the screenplay, making it her screenwriting debut. The story follows Newt Scamander, a magizoologist, in a wizarding-world narrative set decades before the Harry Potter films.

Unlike the Harry Potter movies, the Fantastic Beasts films were not adaptations of previously published Rowling novels. The first film was developed from the fictional textbook title that appears in the Harry Potter universe, but its plot and characters were created for the film project.

The series continued with The Crimes of Grindelwald in 2018 and The Secrets of Dumbledore in 2022. David Yates directed all three released films. The movies expand the wizarding world beyond Hogwarts and introduce the historical conflict involving Albus Dumbledore and Gellert Grindelwald.