Prince William turns 30

Prince William celebrates 30th birthday

Prince William is seen making a royal salute as he watches the scene of Trooping the Colour from the balcony of Buckingham Palace with his brother Harry and mother Princess Diana in London in this June 15, 1985. (REUTERS)

Princess Diana tries to get her son, Prince Harry, to smile for the cameras while his brother Prince William squints from the bright sun on August 9, 1988. Looking on are King Juan Carlos and Prince Charles. The two royal families posed for pictures at Marivent Palace in Palma De Mallorca. (REUTERS)

The Prince and Princess of Wales, Prince Harry, and housemaster Dr Andrew Gayley (behind) escort Prince William (2R), second in line to the throne, for his first day of term at the world famous Eton College September 6, 1995. (REUTERS)

Prince Charles touches the shoulder of his son Harry as his other son Prince William watches the hearse bearing his mother Diana, Princess of Wales being driven from Westminster Abbey following her funeral service September 6. Millions of mourners lined the route to pay their respects. (REUTERS)

Prince Charles stands with his sons Princes William (L) and Harry on the banks of the river Muick near Ballater August 16, 1995. (REUTERS)

Britain's Prince Charles (C) and his sons Prince William (L) and Prince Harry pose for a photo while skiing at Whistler Mountain during their spring break ski vacation. (REUTERS)

Prince William makes tea on the kitchen stove at the Raleigh International expedition team''s accommodation on his day of domestic duties December 7, 2000 in the village of Tortel, Southern Chile. (GETTY/GALLO)

Britain's Prince William and his wife Kate, Duchess of Cambridge stand outside of Westminster Abbey after their Royal Wedding in London. (AP)

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge wave as they attend the Calgary Stampede on July 8, 2011 in Calgary, Canada. The newly married Royal Couple are on the ninth day of their first joint overseas tour. (GETTY/GALLO)

Prince William, Duke of Cambridge waves to the crowd as he attends the Order of the Garter procession and service at Windsor Castle on June 18, 2011 in Windsor, England. (GETTY/GALLO)

Britain's Prince William poses in a Sea King helicopter at the Royal Air Force base Valley in Anglesey, Wales in a recent photo released June 7, 2012. Prince William, or Flight Lieutenant Wales as he is known in the military, has qualified as an operational captain within the Royal Air Force Search and Rescue Force. (REUTERS)

Prince William, Duke of Cambridge smiles as he visits Port Lympne Wild Animal Park on June 6, 2012 in Port Lympne, England. Prince William, Duke of Cambridge was visiting the park to meet staff and rhinos involved in a translocation project. The Aspinall Foundation along with the Tusk Trust and the George Adamson Trust are combining forces to stage a rare translocation of three captive born black rhino to Mkomazi National Park in Tanzania in order to rejuvenate numbers of the black rhino in the area. (GETTY/GALLO)