The London hospital treating Prince William's pregnant wife Kate for severe morning sickness admitted on Wednesday it had fallen for a prank call from an Australian radio station, relaying personal details about her condition.

Kate, the Duchess of Cambridge, was admitted to the King Edward VII Hospital in central London on Monday suffering from hyperemesis gravidarum, acute morning sickness which causes severe nausea and vomiting.

News of her pregnancy and her hospitalization generated a worldwide media frenzy with journalists excitedly reporting any updates on her condition along with the facial expressions of William when he arrives and departs.