JK Rowling to feature in The Simpsons

JK Rowling is to make a one-off appearance in The Simpsons.

Homer and his family meet up with the Harry Potter author in a special episode set in London.

Lisa Simpson turns out to be a Potter fan and questions the millionaire.

Sir Ian McKellen also appears in the episode - and is first hit by falling scaffolding, then struck by lightning.

The Simpsons go to see him perform on stage in Macbeth, but bring him bad luck by saying the play's name aloud - a theatrical superstition.

A spokesman for the cult US cartoon told The Sun: "The Simpsons bump into JK Rowling outside a bookshop and they talk all about Harry Potter.

"We're very excited about the episode and rest assured every British cliche will be trotted out to get a laugh."