Princess Maria-Olympia of Greece and Denmark

Princess Maria-Olympia of Greece and Denmark, born on July 25, 1996, is a fashion model, socialite, and member of the former Greek royal family. She is the oldest child and only daughter of Pavlos, Crown Prince of Greece, and Marie-Chantal Miller. 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. She has four younger brothers: Prince Constantine-Alexios, Prince Achileas-Andreas, Prince Odysseas Kimon, and Prince Aristidis-Stavros.

She was born at Weill Cornell Medical Center in Lenox Hill, Manhattan, New York. On December 22, 1996, she was baptized into the Greek Orthodox Church by Patriarch Bartholomew I of Constantinople at the Church of St. George in Istanbul, Turkey. Her godparents are her paternal aunt Princess Alexia of Greece and Denmark, her maternal aunt Pia Getty, her grandfather's second cousin Charles III, and Prince Michael of Greece and Denmark. Her family subsequently moved to London, where she spent most of her childhood. In everyday life, she uses the name Olympia.

Olympia attended her first couture show in Rome at around 11 years of age with her parents. While attending boarding school in Switzerland, she studied art history, theatre, photography, and graphic design with the intention of pursuing a career in art or fashion. At age 17, she interned in the couture department at Dior. She is dyslexic. In the fall of 2015, she enrolled in college in New York and studied photography at the Parsons School of Design in 2016. In 2019, she completed her education with a degree in Fashion Business and Marketing from New York University's Gallatin School of Individualized Study.

Her modeling career expanded in April 2016 when she appeared in a Vanity Fair feature alongside her first cousins Isabel Getty and Princess Talita von Fürstenberg. She has since modeled for magazines including Teen Vogue, Town & Country, Tatler, Hello!, ¡Hola!, and W. On the runway, she walked for Dolce & Gabbana in June 2017 and has also modeled for Michael Kors.

In August 2018, the Saks Potts Spring/Summer 2019 show during Copenhagen Fashion Week was named OLYMPIA after her, and she opened the show as the first model on stage. She later served as the face of Pretty Ballerinas' Spring/Summer 2019 collection.

In May 2016, reports suggested a romantic involvement with Prince Harry, though a representative for the British royal family denied the rumors. In 2021, she began a relationship with The Hon. Peregrine Pearson, son and heir of Michael Pearson, 4th Viscount Cowdray, which was reported to have ended in September 2023. On September 28, 2024, she served as a bridesmaid at the wedding of her aunt, Princess Theodora of Greece and Denmark, and Matthew Kumar at the Metropolitan Cathedral in Athens. On December 20, 2024, she acquired Greek citizenship under the surname de Grèce alongside other members of the former Greek royal family.