Brownies from the 1st Cawston group will be travelling to London's Natural History Museum to meet the author, JK Rowling, when Harry Potter and the Deathly Hallows is released at midnight on Friday, July 20.
This is because their leader, Jen Smith, entered and won a competition on publishers, Bloomsbury's website.
Each of the Brownies will be given a copy of the book, and will then stay overnight at Baden Powell House
This will be a night to remember.