JK Rowling earns $5 million a week. The "Harry Potter" author's incredible earnings - equivalent to $8 a second - are from the 375 million sales of the seven books in the popular children's series, a percentage of revenue from the movie adaptations and spin-off merchandise, including toys and video games, according to financial bible Forbes.

JK - real first name Joanne - is believed to be worth around $1 billion and is expected to see her earnings soar even further, with three more "Harry Potter" movies scheduled for release.

Daniel Radcliffe struggles to tie his own shoelaces - because of a medical condition.

The "Harry Potter" star has revealed he has the condition dyspraxia - a common neurological problem which causes sufferers to have difficulties planning any sequence of coordinated movements - and can sometimes struggle to complete the most basic of tasks.

Daniel Radcliffe has revealed he will appear naked in the next Harry Potter film.

The actor - who has starred as the teen wizard in five movies in the franchise based on the books by J.K. Rowling - admits he was unsure when he was told he would be appearing without trousers in a scene in "Harry Potter and the Deathly Hallows."

Daniel Radcliffe is toning up his butt in preparation for his Broadway debut.

The 'Harry Potter' actor - who starts his run on the New York stage in September - wants to make sure he is in top physical condition for his role in 'Equus', in which he appears naked.

Daniel Radcliffe's manhood will be protected by security when he makes his Broadway debut.

The 'Harry Potter' actor will strip naked in the play 'Equus' in New York later this year and theater bosses are worried audiences may try and sneak cameras in, just as some fans did when he starred in the West End version of the play.

J.K. Rowling confesses to suicidal thoughts after her first marriage failed.

The billionaire author of the best-selling Harry Potter series opens up to an Edinburgh University student magazine about her depression period and how she struggled to overcome her dark moments.