Anne-Marie and her family were stripped of their Greek citizenship and had their property revoked, leading them to sue in the European Court of Human Rights.

Her godparents were her paternal grandparents, King Christian X and Queen Alexandrine of Denmark; her maternal grandfather, Crown Prince Gustaf Adolf of Sweden; her maternal uncle Prince Bertil, Duke of Halland; her paternal great-uncle King Haakon VII of Norway; her paternal great-aunt Princess Dagmar of Denmark; her grandfather's cousin Prince George of Greece and Denmark; her father's cousin, Crown Princess Märtha of Norway; Queen Mary of the United Kingdom; and Crown Princess Juliana of the Netherlands.

Therefore, she is related to many other members of European royalty, such as her future husband Constantine II, who is also a great-great-grandchild of both Queen Victoria and Christian IX of Denmark.

Moreover, Anne-Marie is the aunt by marriage of Felipe VI of Spain and the first cousin of Carl XVI Gustaf of Sweden.

On 20 April 1947, less than a year after Princess Anne-Marie's birth, her grandfather, Christian X, died, and her father ascended the throne as King Frederik IX.

[4] In 1959, at the age of 13, Anne-Marie first met her future husband, her third cousin Constantine, Crown Prince of Greece, who accompanied his parents, King Paul and Queen Frederica, on a state visit to Denmark.

The pair became secretly engaged without telling the public nor members of their families due to Frederik IX's opposition to their relationship because of her age.

[6][7] They met again in Athens in May 1962 at the wedding of Constantine's older sister, Princess Sophia of Greece and Denmark, and Prince Juan Carlos of Spain.

[7] Constantine's mother, Frederica, initially requested that one million dollars be spent on the wedding, however, the private office of the Danish royal family denied this.

Also, in view of the fact that she was marrying a foreign ruler, consent to the marriage was given on the condition that Anne-Marie renounce her succession rights to the Danish throne for herself and her descendants.

[11] As Queen of Greece, Anne-Marie's initial primary role was to provide the nation with an heir who would eventually take over as King.

[14][15] A group of Greek soldiers in April 1967 overthrew the government of the new Prime Minister, Panagiotis Kanellopoulos, which marked the beginning of a military dictatorship in Greece.

The royal family was left unaware and in order to avoid fighting, Constantine and Anne-Marie agreed to recognise the dictatorship against their will, however many members of the public therefore believed that they supported and even funded the coup.

[16][17][18] The following month, Anne-Marie gave birth to a son, Pavlos, who immediately assumed the position of Crown Prince of Greece from his sister.

[19] At his baptism, Anne-Marie and Constantine decided to make Frederica his godmother and the Hellenic Army his godfather figure.

As a result of the military coup, relations between Athens and Copenhagen had been deteriorating and in an attempt to salvage "national security", no member of the Danish royal family was permitted to attend the baptism.

Anne-Marie, the sister of Margrethe, and Constantine were subsequently denied an invite to their wedding, further ruining relations for a period of time.

[26][27] Anne-Marie eventually agreed with Constantine to move to 13 Via di Porta Latina, where a large villa owned by Countess Cristina Paolozzi was located.

[29] Anne-Marie fell pregnant again in February of the next year and gave birth to Prince Nikolaos of Greece and Denmark.

It was reported that Anne-Marie in 1974 was considering filing a divorce and moving back to Denmark, however, their relationship was repaired and even "strengthened" as a result.

For example, the pair attended the 21st birthday of Charles, Prince of Wales, in 1969,[35] the 2500th anniversary of the founding of the Persian Empire in 1971,[36][37] and the baptism in Madrid of François, the eldest son of Alfonso, Duke of Anjou and Cádiz.

The failed coup directly resulted in the 1974 Turkish invasion of Cyprus, which brought great opposition to the Greek junta.

Anne-Marie and Constantine received financial aid from Hussein of Jordan and Mohammad Reza Pahlavi, the Shah of Iran.

When the family stopped for oil at a port in southern Greece, Anne-Marie and Constantine were swarmed with crowds of people and press, who greeted them with cheers and claps.

[33][52] Possibly as a result of their 1993 visit,[51] Prime Minister Andreas Papandreou confiscated all property of the exiled royal family, including Tatoi, Mon Repos and Psychico, a farm located on Mount Hymettus.

In 2003, Constantine used the money they received to establish the Anna-Maria Foundation, a not-for-profit organisation aimed to provide aid to victims of natural disasters, particularly those of floods, earthquakes and bushfires.

At a soirée held at the Zarzuela Palace during the wedding celebrations of Felipe, Prince of Asturias, Amedeo approached Vittorio, who reportedly punched him twice in the face, causing him to stumble backward down the steps.

[61] Upon learning of the incident Spain's King Juan Carlos, a cousin of both men, reportedly declared that "never again" would an opportunity to abuse his hospitality be afforded the competing pretenders.

He and his wife, Anne-Marie, purchased a villa in Porto Cheli, Peloponnese residing there until they relocated to Athens in the spring of 2022.

[70] On 19 December 2024, Anne-Marie's children and five of her grandchildren applied for Greek citizenship, selecting the surname "Ντε Γκρες" (De Grèce; "of Greece").