NORFOLK, ENGLAND - APRIL 2017: In this undated handout image released by the Duke and Duchess of Cambridge, Princess Charlotte is pictured at home in April in Norfolk, England. The photograph was taken in April by The Duchess at their home in Norfolk to mark Princess' second birthday. (Photo by HRH The Duchess of Cambridge via Getty Images)

NEWS EDITORIAL USE ONLY. NO COMMERCIAL USE (including any use in merchandising, advertising or any other non-editorial use including, for example, calendars, books and supplements). This photograph is provided to you strictly on condition that you will make no charge for the supply, release or publication of it and that these conditions and restrictions will apply (and that you will pass these on) to any organisation to whom you supply it. All other requests for use should be directed to the Press Office at Kensington Palace in writing.

NOTE TO EDITORS: This handout photo may only be used in for editorial reporting purposes for the contemporaneous illustration of events, things or the people in the image or facts mentioned in the caption. Reuse of the picture may require further permission from the copyright holder.
This picture taken on October 17, 2016in Oslo and released on February 17 2017 shows King Harald V of Norway and Sonja of Norway.  
The couple will both celebrate their 80th birthdays later this year, King Harald on 21 February, Queen Sonja on 4 July.  / AFP / NTB Scanpix / Lise AASERUD / Norway OUT        (Photo credit should read LISE AASERUD/AFP/Getty Images)
LONDON, ENGLAND - MAY 23:  Queen Elizabeth II visits the Chelsea Flower Show Press and VIP Day on May 23, 2011 in London, England.  (Photo by Paul Grover - WPA Pool/Getty Images)
LONDON, ENGLAND - JUNE 25:  (NO PUBLICATION IN UK MEDIA FOR 28 DAYS)  Children and parents picnic at the Children's Party at the Palace, a children's literacy garden party to celebrate the Queen's 80th birthday at Buckingham Palace on June 25, 2006 in London, England. (Photo by Pool/Tim Graham Picture Library/Getty Images)
View of the wedding of Prince Juan Carlos (Juan Carlos Alfonso Victor Maria de Borbon), future King of Spain and Princess Sofia of Greece and Denmark at the Royal Palace in Athens, Greece on 14th May 1962. (Photo by Rolls Press/Popperfoto/Getty Images)