Inside the high society birthday bash of the year: See how Princess Olympia of Greece celebrated her 21st birthday with star-studded guest list

Princess Olympia of Greece turns 21 on the 25th July, and started the celebrations early over the weekend with an A-list party in the Cotswolds. Sharing the double-party with her father, Pavlos, Crown Prince of Greece, who turned 50 on 20th May, guests ...

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