What is the title of the first screenplay written by J.K. Rowling for a Harry Potter-related film series?

The first screenplay J.K. Rowling wrote for a Harry Potter-related film series was Fantastic Beasts and Where to Find Them. The film was released in 2016 and marked her screenwriting debut.

The story is set in 1926, decades before Harry Potter begins his education at Hogwarts. Its central character is Newt Scamander, a magizoologist who arrives in New York with a case containing magical creatures. The plot expands the wizarding world beyond the original novels and introduces a different historical setting.

The title comes from a Hogwarts textbook mentioned in the Harry Potter books. Rowling had previously published a short companion book with that title in 2001 for charity, presented as a schoolbook attributed to Newt Scamander.

The film was directed by David Yates and starred Eddie Redmayne as Newt. Its screenplay was written by Rowling, distinguishing it from the earlier Harry Potter films, whose screenplays were adapted by other writers from her novels.