Preparations At The Lindo Wing Ahead Of The Birth Od The Duke And Duchess Of Cambridge's Second Child [Getty Images]

LONDON, ENGLAND - APRIL 21: Margaret Tyler (3rd from right) and Terry Hutt (2nd from right) are joined by other royalists to celebrate Queen Elizabeth II's Birthday and wait outside the Lindo Wing of St Mary's Hospital as the UK prepares for the birth of the second child of The Duke and Duchess of Cambridge at St Mary's Hospital on April 21, 2015 in London, England. (Photo by Samir Hussein/WireImage)

WireImage Samir Hussein