Hardy was born at 17 January 1944 in Paris and grew up in rich family. From her childhood, she was so interested in literature that she was attracted to Simone de Beauvoir and Albert Camus. She received a guitar from her mother as a present for her passing baccalaureat at 16. It caused her to get interested in Chanson. Hardy mastered guitar by herself and showed an interest in composing chanson. Trying to be a singer was hard, she failed many times. After entering the University of Sorbonne in Paris, she kept studying a chanson in Petit conservatoire de la chanson, a chanson school founded by Mireille who was a famous singer at that time. Soon, she contracted with the record label Vogue in November 1961.