Norway National Day Is Celebrated In London [Getty Images]

LONDON, UNITED KINGDOM - MAY 17: Princess Martha Louise of Norway, with her daughters:Maud Angelica Behn, Emma Tallulah Behn and Leah Isadora Behn attend celebrations for Norway National day, in Southwark Park on May 17, 2014 in London, United Kingdom. (Photo by Julian Parker/UK Press via Getty Images)

UK Press Julian Parker