Prince Achileas-Andreas of Greece and Denmark is one of King Constantine II's grandchildren.
His other grandfather is retail magnate Robert Miller, who is worth almost $2 billion.
Achileas-Andreas has been romantically linked to Net-a-Porter heiress Isabella Massenet.
His Royal Highness Prince Achileas-Andreas of Greece and Denmark — or, according to his Instagram bio, simply "Achileas of Greece" — has reached influencer status, having amassed almost half a million followers.
Although many of his social-media posts show him living a life not so different from the average 20-something, Achileas-Andreas lives a uniquely glamorous life as a member of Greece's royal family.
Achileas-Andreas is the grandson of the last king of Greece
Achileas-Andreas is the third child of Pavlos, the Crown Prince of Greece, and Marie-Chantal, the Crown Princess of Greece (who was born into the Danish royal family). Pavlos is the first-born son of King Constantine II and Queen Anne-Marie of Greece, who ruled as Greece's king and queen until a 1973 referendum ended the Greek monarchy.
The referendum took place after a right-wing military coup that began in 1967. After King Constantine ultimately failed at instating a counter-coup, he and his family moved around Europe while living in exile.
Almost 69 percent of voters in Greece voted to abolish the country's monarchy in favor of a republic, The New York Times reported. Konstantinos Karamanlis was elected prime minister and the new Greek parliament gathered in December 1974, marking the official end of the monarchy.
While in exile, Constantine spent considerable time in London, where he had a close relationship with King Charles, his second cousin. He was named one of Prince William's godfathers.
Constantine II died in January, age 82.
His son, Pavlos, spent much of his adult life in the United States. He met Marie-Chantal in New Orleans in 1992, and four of their five children, including Achileas-Andreas, were born in the US. The former royals have lived in Connecticut, California, and New York.
Achileas-Andreas' maternal grandfather is billionaire Robert Miller
While Achileas-Andreas' paternal grandfather, Constantine II, was the last king of Greece, there is vast wealth and influence on his mother's side, as well.
Marie-Chantal's father is retail magnate Robert Miller, who has an estimated net worth of almost $2 billion, according to Forbes. Now 89 years old, Miller made his fortune by cofounding Duty Free Shops in 1960. He has co-owned the company, along with fashion conglomerate LVMH, since 1997.
But Miller isn't the only successful member of Achileas-Andreas' family.
Achileas-Andreas is one of 5 siblings
Achileas-Andreas, 22, has four siblings: 26-year-old Maria-Olympia, 24-year-old Constantine-Alexios, 18-year-old Odysseas-Kimon, and 14-year-old Aristidis-Stavros.
His family maintains their royal titles, so he and his brothers are princes and his sister is a princess. However, the family holds no political power.
His only sister, Maria-Olympia, is a model and socialite
As a teenager, Maria-Olympia, who often goes by Olympia, interned at Christian Dior. But her interest in fashion dates back to her childhood.
In 2020 she told Vogue, "I went to a Valentino show with my mother and father in Rome and I remember sitting on my father's lap and thinking this is unbelievable."
Achileas-Andreas was born in NYC and attends New York University
Achileas-Andreas is currently a student at New York University. He was born in New York City, but between his early childhood and college years, he lived in London with his family and attended school there.
He acts and has appeared in 'The Bold and the Beautiful'
In 2017, Achileas-Andreas appeared in a few episodes of the CBS soap opera "The Bold and the Beautiful." He was credited under his stage name, Achi Miller.
That same year, he spoke to Paper Magazine about acting, saying, "It was always a great passion of mine. When I was a kid I remember always watching movies and TV shows and I was like, 'This is what I want to do: be an actor.'"
Although he's only acted in one other project — a short film titled "Just Noise" released in 2022 — since "The Bold and the Beautiful," he expressed interest in moving to LA in his interview with Paper Magazine. When asked if he'd consider moving to LA to pursue acting, he said, "Oh yeah, 100%, definitely. I love going to LA. Every time I go to LA I love being out there."
He has been romantically linked to Net-a-Porter heiress Isabella Massenet
Achileas-Andreas is reportedly dating Isabella Massenet, a model, DJ, and the daughter of Natalie Massenet, the founder of luxury fashion brand Net-a-Porter.
Despite his royal status, he posts like any other influencer
Just like any other 20-something, he shares photos of himself partying with friends and photos of his food.
According to his Instagram profile, he also travels widely. His profile is full of photos documenting his trips around the world, which include visits to countries across Europe and Africa.
However, he also references his royal connections on his Instagram profile. Following the Queen's death in September 2022, he posted a series of photos of her, calling her "the most remarkable public servant of recent world history."
"And on a more personal level," he added, "tales of her wonderful yet characteristic kindness have always been handed down to me by my father and grandfather who remember how she welcomed and supported my family when they arrived in England."
He also posts photos of his own family. Following his grandfather's death in January 2023, he shared photos of him, and referenced Constantine's love of sailing. (Before he was king, Constantine won a gold medal for sailing at the 1960 Olympics.)
"My Dearest Apapa, we all miss you so much. Sailing on into your new adventure," Achileas-Andreas wrote.
Achileas-Andreas didn't respond to Insider's requests for comment.
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