|Prince Achileas-Andreas of Greece and Denmark|
The prince was born on 12 August 2000 at NewYork–Presbyterian Hospital, New York City.. He is the third child and second son of Crown Prince Pavlos of Greece and Crown Princess Marie Chantal (née Miller). Achi, as he is known in the family, has two older siblings: Princess Maria-Olympia (b.1996) and Prince Constantine-Alexios (b.1998). Achileas-Andreas was followed by two younger brothers: Prince Odysseus-Kimon (b.2004) and Prince Aristidis-Stavros (b.2008).
The christening of Prince Achileas-Andreas took place on 7 June 2001 at the Greek Cathedral of Saint Sophia in London. The Archbishop of Thyateira and Great Britain, Gregorios, officiated over the ceremony. The prince's godparents are Princess Theodora of Greece and Denmark; Infanta Elena of Spain, Duchess of Lugo; Prince Alexander von Furstenberg; Crown Prince Kardam of Bulgaria; Princess Rosario of Bulgaria; Prince Guillaume of Luxembourg; and Miss Veronica Toub.
Achileas-Andreas was educated at Wellington College in Berkshire. With his parents and younger siblings, the prince moved back to New York City when his sister Olympia and brother Tino started university. In June 2019, Achileas-Andreas graduated from Dwight High School in New York. In September 2019, Achi of Greece began attending NYU (New York University).