Athina Onassis made a rare public appearance on Sunday, July 6, attending the Bal d’Été (French for “Summer Ball”) in Paris, an elegant social event recently revived under the creative direction of renowned filmmaker Sofia Coppola. Blending high society glamour with charitable fundraising, the ball is a thematic celebration of culture, fashion, and the arts.
Onassis’ attendance at this high-profile gala, which reimagines the historic grandeur of European summer galas for a modern audience, marked her second public outing in recent years—following her presence at a charity art event hosted by the Friends of the Pompidou Center in France just four months earlier. That appearance came after a three-year absence from the public eye.
Athina Onassis’ latest public appearance
The 40-year-old granddaughter of shipping typhoon Aristotle Onassis is known for leading a private life, reportedly dividing her time between a small town in the Netherlands and Belgium.
At the debut of the Bal d’Été, an exclusive gathering of 300 guests, Athina commanded attention in a dazzling red gown, looking more radiant than ever.
Η σπάνια δημόσια εμφάνιση της Αθηνάς Ωνάση σε εκδήλωση στο Παρίσι – Newspaper "H MAXH", CYPRUS https://t.co/ZLiJ0XzzN9 pic.twitter.com/qSUmsZ9jO0
— CYLIFE Official page (@CYLIFENEWScom) July 8, 2025
She shared the spotlight with global icons such as Keira Knightley, Kirsten Dunst, and Anna Wintour at a gala renowned for its glamour, exclusivity, and philanthropic mission.
The event raised funds for the Museum of Decorative Arts, which served as the majestic venue for the evening. Onassis’ understated elegance and rare public presence added to the night’s allure, confirming her quiet yet enduring status among Europe’s elite social circles.
The reclusive heiress
Athina Onassis, who turned 40 in January 2025, is the last surviving heir of Greek shipping tycoon Aristotle Onassis.
Born on January 29, 1985 and later baptized at her grandfather’s home on the Greek island of Skorpios, Athina currently resides in Belgium but has also lived in various locations throughout her life, including Switzerland, Brazil, and the United States.
Athina is the daughter of Christina Onassis, who died at 37 after a life marked by excess. With her uncle Alexandros having perished in a 1973 plane crash, she is now the sole surviving Onassis. Like her grandfather and mother, she has faced numerous personal difficulties despite her wealth.
Her father, Thierry Roussel, a French pharmaceutical heir, never earned her mother’s trust, and their brief, rocky marriage ended after just eight months. Athina’s $800 million inheritance from her mother’s estate was held in trust until her 18th birthday.
Athina Onassis’ net worth and new business venture
The exact net worth of Athina Onassis, the only surviving descendant of Greek shipping magnate Aristotle Onassis, is unknown. However, most analysts estimate it to be well under one billion dollars nowadays.
Estimates of Athina Onassis’ net worth by asset class are believed ot be as follows:
- Real estate: $200-300 million
- Cash: $100-200 million
- Stocks and bonds: $100-200 million
- Horses and equestrian property: $50-100 million
- Other assets: $50-100 million
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