LONDON, ENGLAND - MAY 02: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge depart the Lindo Wing with their newborn baby daughter at St Mary's Hospital on May 2, 2015 in London, England. (Photo by Samir Hussein/WireImage)
LONDON, ENGLAND - MAY 02: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge depart the Lindo Wing with their newborn baby daughter at St Mary's Hospital on May 2, 2015 in London, England. (Photo by Samir Hussein/WireImage)