Athina Onassis, daughter of French businessman Thierry Roussel and socialite Christina, attended the exclusive Bal d'Été in Paris, directed by Sofia Coppola. The event, which welcomes 300 A-Listers, raised money for the Musée des Arts Décoratifs. Athina wore a stunning red dress to the gala, where she posed with celebrities including Kiera Knightley and Anna Wintour. This marks her first public appearance in three years, following her marriage breakdown in 2016.