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SYDNEY, AUSTRALIA - APRIL 16: Private Secretary to the Duchess of Cambridge Rebecca Deacon, and Nanny Maria Borrallo arrive at Sydney Airport on RAAF B737 on April 16, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Ryan Pierse/Getty Images)

SYDNEY, AUSTRALIA - APRIL 16:  Private Secretary to the Duchess of Cambridge Rebecca Deacon, and Nanny Maria Borrallo arrive at Sydney Airport on RAAF B737 on April 16, 2014 in Sydney, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge.  (Photo by Ryan Pierse/Getty Images)