Queen Anne-Marie Queen Sofía of Spain Princess Irene Marina, consort of Prince Michael Princess Maria-Olympia of Greece and Denmark (Greek: Μαρία Ολυμπία Ντε Γκρες, romanized: María-Olympía de Grèce; born 25 July 1996) is a fashion model, socialite and member of the former Greek royal family.

Her paternal grandparents are Constantine II of Greece and Anne-Marie of Denmark, who were the last King and Queen of the Hellenes, while her maternal grandfather is duty free entrepreneur Robert Warren Miller.

[12] In April 2016, Maria-Olympia posed alongside two of her first cousins, Isabel Getty and Princess Talita von Fürstenberg in a Vanity Fair feature.

[23] It was reported in May 2016 that Maria-Olympia was romantically involved with her godfather's son and third cousin once removed Prince Harry, but a representative of the British Royal Family denied the rumors.

[26] On September 28, 2024, she served as a bridesmaid at the wedding of Princess Theodora of Greece and Denmark and Matthew Kumar at the Metropolitan Cathedral in Athens.