Britain's Prince William

Associated Press
Britain's Prince William leaves after attending the wedding of the Duke and Duchess of Northumberland's daughter Lady Melissa Percy to chartered surveyor Thomas van Straubenzee at St Michael's Church in Alnwick, England, Saturday, June 22, 2013. (AP Photo/Scott Heppell)

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Britain's Prince William, the oldest son of Princess Diana and Prince Charles, turned 31 on June 21. The prince, also known as the Duke of Cambridge, is expecting his first child with wife, Catherine Middleton.

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