She spent her early years in Nice (France), where she was discovered at 14 by Roger Vadim, the director of And God Created Woman and Barbarella, who saw her as the next Brigitte Bardot and cast her in a version of Les Liaisons dangereuses (1959).

In 1965, she signed to the AZ record label run by the radio station Europe 1 and issued an EP that included "Rentre Sans Moi", a French cover of the Zombies' "Leave Me Be";[5] and her self-penned "Rien N'Est Changé".

In 2008, Hills' self-penned song "Qui a Su" was chosen for Jean-François Richet's film Mesrine Part One: Killer Instinct with Vincent Cassel.

In 1970, Georges Franju chose her to play the part of Albine opposite Francis Huster in La Faute de l'abbé Mouret, adapted from a novel by Émile Zola.

Other film appearances followed, including a cameo in Stanley Kubrick's A Clockwork Orange (1971),[6] in which Hills played the blonde one of two girls picked up in a record shop by Alex (Malcolm McDowell).

[6] Hills now lives in Britain and the US, and is married to Stewart Young,[6] who has managed AC/DC, Emerson, Lake & Palmer, Cyndi Lauper, Foreigner, Billy Squier, Scorpions and Zucchero.