'Prix de l'Ecole d'Equitation Espagnole de Vienne' And 'Medaille de l'Ecole d'Equitation Espagnole de Vienne' Award [Getty Images]

VIENNA, AUSTRIA - JUNE 23: HRH Princess Anne and members of the the Spanish Riding School during the Award Ceremony for the 'Prix de l'Ecole d'Equitation Espagnole de Vienne' And 'Medaille de l'Ecole d'Equitation Espagnole de Vienne' Award on June 23, 2017 in Vienna, Austria. The award is given by the Spanish Riding School Vienna. (Photo by Chris Hofer/Getty Images)

Getty Images Entertainment Chris Hofer