LONDON, ENGLAND - JUNE 09:  Catherine, Duchess of Cambridge stands on the balcony of Buckingham Palace during the Trooping the Colour parade on June 9, 2018 in London, England.  (Photo by James Devaney/FilmMagic
LONDON, ENGLAND - JUNE 09: Camilla, Duchess Of Cornwall and Catherine, Duchess of Cambridge during Trooping The Colour on the Mall on June 9, 2018 in London, England. The annual ceremony involving over 1400 guardsmen and cavalry, is believed to have first been performed during the reign of King Charles II. The parade marks the official birthday of the Sovereign, even though the Queen's actual birthday is on April 21st.  (Photo by Chris Jackson/Getty Images)
LONDON, UNITED KINGDOM - JUNE 09: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge travels down The Mall in a horse drawn carriage during Trooping The Colour 2018 on June 9, 2018 in London, England. The annual ceremony, involving over 1400 guardsmen and cavalry, is believed to have first been performed during the reign of King Charles II. The parade marks the official birthday of the Sovereign, even though the Queen's actual birthday is on April 21st. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, ENGLAND - JUNE 09:  Catherine, Duchess of Cambridge rides by carriage during Trooping The Colour 2018 on the Mall on June 9, 2018 in London, England.  (Photo by Samir Hussein/Samir Hussein/WireImage)