Royal Lineage
Prince Philippos is the youngest son of King Constantine and Queen Anne-Marie, the last of Greece's official monarchy, which was abolished in 1973. His father, a distant cousin of Prince Charles and godfather of Prince William, comes from a long line of Greek royals while his mother was the Princess of Denmark when she wed.
Philippos's siblings include Pavlos, Crown Prince of Greece, who is married to American socialite Marie-Chantal. Their daughter (who you may follow on Instagram), Princess Olympia, is Philippos's niece. Whew, those royal family trees, man.