Constantine II of Greece
Princess Nathalie of Sayn-Wittgenstein-Berleburg (Nathalie Xenia Margrethe Benedikte; born 2 May 1975) is a Danish equestrian, an Olympian and a daughter of Princess Benedikte of Denmark and Prince Richard of Sayn-Wittgenstein-Berleburg. She's the niece of Queen Margrethe II of Denmark and King Constantine II of Greece.