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Duke and Duchess of Cambridge expecting a baby

3 December 2012 Last updated at 16:36 GMT

The Duchess of Cambridge is expecting a baby, St James's Palace has announced.

Members of the Royal Family and the duchess's family, the Middletons, are said to be delighted following Monday's announcement.

A spokesman said the duchess has been admitted to King Edward VII Hospital in central London with acute morning sickness and is expected to stay for several days.

Luisa Baldini looks back on the royal romance with royal biographer Hugo Vickers.

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