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Royal Birthday Boy Photos

From left, Princess Eugenie, Prince William, Queen Elizabeth II, Prince Philip and Prince Charles watch from the balcony of Buckingham Palace after taking part in the annual Trooping the Colour ceremony in London on June 16, 2007. William turned 25 on June 21; he's reportedly spending his birthday training with the Army at Lulworth in Dorset, England.

(Photo: AP Photo/Alastair Grant)

Watch Video VIDEO: Happy Birthday, Prince William