J.K. Rowling "Crying Eyes Out" at 'The Casual Vacancy' on BBC

The three-part TV drama drew to a close over the weekend.

J.K. Rowling has revealed that the finale of the BBC's adaptation of her first post-Harry Potter novel, The Casual Vacancy, had her in tears.

"Well, that's me crying my eyes out, so job done. Serves me right, some might say. Thank you, thank you xxx," she tweeted on Saturday after the final episode of the three-part drama aired.

However, several viewers complained on social media about the BBC altering the story to make it less bleak than the book.

The Casual Vacancy bowed out with overnight average viewers of 4.6 million on BBC One, representing a 20.4 percent audience share, according to rating company Overnights.tv. It debuted on Feb. 16 with 6.6 million viewers.

This year will see a cinematic return to the Harry Potter universe, with Warner Bros. due to start production on the adaptation of Rowling's Fantastic Beasts and Where to Find Them. David Yates is directing the first Potter spinoff.

The Casual Vacancy will air on HBO in late April.