Baby Britannia on the way! Catherine, the Duchess of Cambridge, who is more commonly known as Kate Middleton, and Prince William, the Duke of Cambridge, are expecting their first child. The couple, who married in April 2011, issued a statement through the Palace, "Their Royal Highnesses The Duke and Duchess of Cambridge are very pleased to announce that The Duchess of Cambridge is expecting a baby. The Queen, The Duke of Edinburgh, The Prince of Wales, The Duchess of Cornwall and Prince Harry and members of both families are delighted with the news."

Additionally, the statement from Clarence House noted, "The Duchess was admitted this afternoon to King Edward VII Hospital in Central London with Hyperemesis Gravidarum. 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." Hyperemesis Gravidarum is fancy talk for morning sickness symptoms which can cause dehydration. Middleton does have an active schedule of events—just last week, she played field hockey in heels at her old school.

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Middleton at St Andrew's Day at St Andrew's School on November 30, 2012 in Pangbourne, Berkshire, England (Getty Images)

Whether the couple has a boy or a girl, the child will be the heir to the throne. As ABC News reminds us, "Last year, the heads of 16 Commonwealth countries agreed to a change in the rules of succession so that first-born children of either gender can take the throne. Queen Elizabeth II was only eligible to be monarch because her father had no male children... 'Put simply, if the Duke and Duchess of Cambridge were to have a little girl, that girl would one day be our queen,' British Prime Minister David Cameron told reporters in 2011." The Daily Mail adds a fun fact, "The last time a still-serving monarch got to meet a great grandchild born in direct succession to the crown was nearly 120 years ago."