A confidential report says Prince William's wife Kate is expecting the couple's first baby, the prince's office said Monday.
The news came as Kate, 30, was admitted today to King Edward VII Hospital in Central London with hyperemesis gravidarum, or acute morning sickness, which requires supplementary hydration and nutrients.
"As the pregnancy is in its very early stages, Her Royal Highness is expected to stay in hospital for several days and will require a period of rest thereafter," the statement said.
There was no confirmed information provided on when the baby is due. Several media reports, however, indicated Kate was approaching the 12th week of her pregnancy.
The palace said the Queen, the Duke of Edinburgh, the Prince of Wales, the Duchess of Cornwall, Prince Harry and members of both families are delighted with the news of the pregnancy.
"They will make wonderful parents," British Prime Minister David Cameron tweeted following the announcement.
In Canada, Prime Minister Stephen Harper tweeted his good wishes to the royal couple on behalf of himself and his wife: "Laureen and I congratulate the Duke and Duchess of Cambridge on their wonderful news #royalbaby."
Gov. Gen. David Johnston sent a congratulatory message from Peru, where he is travelling on a diplomatic mission to Central and South America. He noted that the royal couple had attracted large and appreciative crowds when they toured Canada last year. "With this happy news, we have once again a chance to show our admiration," he wrote.