It seems Prince William is partied out! It's been a hectic 2 months for the prince and it's about to get crazier as he moves into Kensington Palace with Kate Middleton and then embarks on a tour of the U.S. and Canada where he will make a number of public speeches.

Which is probably why Prince William is spending his 29th birthday at work today.

William will spend the day at work as a Royal Air Force helicopter pilot and is said to be celebrating his birthday privately afterwards.The low-key day follows in the example of William's grandfather, Prince Philip who spent his 90th birthday doing charity work earlier this month.

The Duke and Duchess of Cambridge will embark on their first foreign tour together next week, making stops in California and Canada.

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Britain's Prince William and Catherine, Duchess of Cambridge, walk up the aisle, followed by Prince Harry and Maid of Honour Pippa Middleton, after their wedding ceremony in Westminster Abbey, in central London. Reuters
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File photograph shows Diana, Princess of Wales arriving at a memorial service with her sons William and Harry during the 50th anniversary of the Blitz of London Reuters
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File photograph shows Prince William making a royal salute as he watches the scene of Trooping the Colour from the balcony of Buckingham Palace. Reuters
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Britain's Prince Williams and Prince Harry, U.S. rapper Kanye West and rapper P. Diddy attend at a backstage party after the Concert for Diana at Wembley Stadium in London Reuters
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Britain's Prince William waves to the crowd at the start of the Concert for Diana at Wembley Stadium in London. Reuters
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Princess Diana is covered in sand by her son Prince William during a private beach holiday on Necker Island. Reuters
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A waxwork of Britain's Prince William is unveiled at Madame Tussauds in London. Reuters
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