BRUSSEL, BELGIUM - JUNE 17: Prince Guillaume and his wife chat with Prince Pieter-Christiaan van Oranje Nassau and Prince Napoleon on June 17, 2015 in Brussel, Belgium. (Photo by Mark Renders/Getty Images)
BRUSSEL, BELGIUM - JUNE 17: Prince Guillaume and his wife chat with Prince Pieter-Christiaan van Oranje Nassau and Prince Napoleon on June 17, 2015 in Brussel, Belgium. (Photo by Mark Renders/Getty Images)