Those naughty shock jocks.

Two DJs from the Australian radio program 2DayFM called the King Edward VII Hospital in London. One of them pretended to be Queen Elizabeth II and asked for information on the Duchess of Cambridge's condition - and got it!

The hospital acknowledged today that the hoax call was made by Mel Greig and Michael Christian in the early hours Tuesday, reports AP. The person mimicking the monarch asked about Kate's morning sickness.

Michael told listeners: "If this has worked, it's the easiest prank call we've ever made."

A nurse who took the call said the duchess was about to be "freshened up," reports the Daily Mail, adding, "She's sleeping at the moment and she has had an uneventful night. She's been given some fluids, she's stable at the moment."

Neither the receptionist who put the call through nor the nurse treating the duchess suspected anything was amiss, reports The Telegraph, despite what the paper calls "distinctly amateur impersonations" of the queen's and Prince Charles' voices. One of the DJs even barked, pretending to be a corgi, while the "queen" wrongly referred to the duchess as "my granddaughter."

The nurse looking after the duchess gave confidential details of her treatment and of her condition, and even talked about what time it would be convenient for the "queen" to visit.

A spokesman for the hospital said it took patient confidentiality extremely seriously and was now reviewing telephone protocols.

USA Today