By Nicole Rojas | | @nrojas0131 ( | First Posted: Dec 06, 2012 03:44 PM EST

Britain's Prince William leaves the King Edward VII hospital with his wife Catherine, Duchess of Cambridge, London December 6, 2012. Prince William's pregnant wife Kate left the King Edward VII hospital in central London on Thursday where she had spent four days being treated for acute morning sickness. (Photo : Reuters)

After three days at west London's King Edward VII Hospital for acute morning sickness, British royal Kate Middleton has finally been discharged. The Duchess of Cambridge looked radiant in a blue-toned dress coat and lavender scarf as she left the hospital on the arm of her husband, Prince William.

The royal couple has faced a hectic couple of days, with well-wishers and members of the media descending on the hospital after it was confirmed that the Duchess was expecting their first child.

Added to the chaos of the media storm, Kate and William were also forced to deal with a radio show prank by two Australian DJs. The morning radio hosts managed to dupe Middleton's nurse with a horrible impression of the Queen in order to get some information about the royal. 

"Hello, I'm just after my granddaughter, Kate, I want to see how her little tummy bug is going," the female DJ, Mel Greig, told Kate's nurse. Greig's co-host Michael Christian can be heard in the background pretending to be Prince Charles. The nurse replied, "She's sleeping at the moment and she has had an uneventful night."

The two hosts later apologized for the prank, as did the hospital for the breach of privacy. However, Prince William's father, Prince Charles, seemed to take the joke lightly when questioned by the media on Thursday. Charles laughingly told reporters, "How do you know I'm not a radio station?" when asked about the baby news.

He added, "I'm thrilled, marvelous. It's a very nice thought to become a grandfather in my old age. I'm very glad my daughter-in-law is getting better, thank goodness."

Meanwhile, Middleton managed to look relaxed while leaving the hospital on Thursday morning. According to the Guardian, the Duke and Duchess briefly paused on the steps of the hospital to allow for photographs and replied that she was feeling "much better" when asked by a journalist.

Middleton, who is less than 12 weeks pregnant, is expected to continue resting at the couple's London home in Kensington Palace, the Guardian reported. The couple was forced to announce the pregnancy of their first child earlier than expected when Middleton was admitted to the hospital with acute morning sickness on Monday. The illness causes severe dehydration and exhaustion. 

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