As "Potter-heads" celebrated the beloved book character's birthday on Sunday, they also received a special treat. A new sequel to the story nearly nine years after the finally installment of the story.

FOX's Jacquelyn Karl reports: 

Die hard Harry Potter fans had a big weekend, staying up for the midnight release Sunday of "Harry Potter and the Cursed Child." A fitting release on the birthday of creator J.K. Rowling and Harry Potter.

It's the script of the play turned into a book. And is a continuation of Rowling's original story, 19 years later. Rowling was a collaborator on "Cursed Child" and while attending the play's premiere Saturday, revealing the show marking the end of Potter's adventures:

(Rowling) "He goes on a very big journey during these two plays and then I think we are done. This is the next generation, you know, so I'm thrilled to see it realized so beautifully, but I know that Harry is done."

The end of an era.

Jacquelyn Karl, FOX News.

Follow Jacquelyn Karl on Twitter: @Jacquelyn_Karl