With the Duchess of Cambridge, otherwise known as Kate Middleton, celebrating her 31st birthday Jan. 9, join us for a look at her through the years.
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Prince William and the Duchess of Cambridge leave King Edward VII Hospital, where she was hospitalized with acute morning sickness, on Dec. 6, 2012. Middleton's four-day hospital stay led the Royal Family to announce that she was pregnant with the couple's first child.