LONDON, ENGLAND - JUNE 12: Catherine, Duchess of Cambridge greets guests during "The Patron's Lunch" celebrations for The Queen's 90th birthday at The Mall on June 12, 2016 in London, England. (Photo by Jeff Spicer/Getty Images)
LONDON, ENGLAND - JUNE 12: Catherine, Duchess of Cambridge greets guests during "The Patron's Lunch" celebrations for The Queen's 90th birthday at The Mall on June 12, 2016 in London, England. (Photo by Jeff Spicer/Getty Images)