US President George W Bush has snubbed producers of The Simpsons by refusing to appear in an episode of the show. Creator Matt Groening was hopeful after convincing British Prime Minister Tony Blair to make a cameo appearance – but was not surprised when the president said no. Groening says, “We’ve now asked every living president and they’ve all said no. In fact they all said, ‘Hell no.'” But the cartoon mastermind is still planning some special guest appearances: “Maybe we should ask Prince William and Prince Harry.”