If 50 cent is making his first $400 million dollar, so J.K Rowling also can too. She has given the go-ahead for the creation of a Florida theme park dedicated to the schoolboy wizard. The park is a joint venture between Warner Bros Entertainment, whose Potter films have so far grossed more than $3.5 billion worldwide, and Universal Orlando Resort.

The park’s opening could help to quell the withdrawal symptoms of Potter fans around the globe who have bought 320 million copies of her wizard tales and turned every one of the films into a box office hit.

Pottermania is set to scale new heights in July with the last novel hitting the bookstands and the latest film being launched in a deluge of global publicity.