After her mother's death in 1964, she was raised by her grandparents in Mexico.
Born to Jean-Louis Sonnery de Fromental, a silk manufacturer and adventurer, and Francion Garreau-Dombasle, daughter of Maurice Garreau-Dombasle, the French ambassador to Mexico.
Is fluent in French and Spanish
Graduating from the Conservatoire Musique de Paris, she is also a singer, performing in Spanish, English and French.
In 2006, she recorded a new version of the French song "C'est si bon" which was written in 1947 by Henri Betti (music) and André Hornez (lyrics). The musical arrangements were done by Jean-Pascal Beintus.