J.K. Rowling has compared the Harry Potter series to an "ex-boyfriend."

The author has just announced plans to launch a new interactive website Pottermore -- which will exclusively sell the 'Harry Potter' novels as digital downloads along with showcasing a vast array of new material -- and she admitted working on site was like "casually dating" a former lover.

Rowling -- who ended the boy wizard's adventures in 2007 with her final book in the series 'Harry Potter and the Deathly Hallows' -- said: "It's like an ex-boyfriend . I've never cried for a man as I cried for Harry Potter. Now we're casually dating and we have been for two years."

The author has also promised to provide a more detailed explanation of the fictional game Quidditch because she has been approached by so many fans who wish to talk about it.

She explained: "The number of geeky men who come up to me to argue about Quidditch -- I'd be a lot richer if I got a quid for every one. They think it's illogical. I had a speech by Dumbledore in the first book explaining why it's not illogical, but it never made it in. It will at some point."

Pottermore will open to the first million users to register on July 31, the date of Harry's birthday, and they will then help to shape the full site which launches in October.