At 16, she joined the Ballet de l"Opera National de Paris and was named étoile December 22, 1990, after the performance of Don Quixote in which she played the role of Kitri. In 1998, she was appointed to the leadership of the National Ballet of Marseille, where she remained five years. After a conflict, the dancers of the company obtained her resignation.
She danced at the Opéra Bastille with Patrick Dupond the "Swan Lake" (1992) and "Les Variations d"Ulysse" (1995) under the direction of Jean-Claude Gallotta.
In 2000, she appeared in a one-woman show "Don"t look back", a solo performance created for her by Carolyn Carlson. In October of that year, she introduced the ballet "Sakountala" that evokes the internal struggle of the sculptor Camille Claudel with her own demons.
In 2002, she choreographed the show "Enzo", a duo created for the show at the Olympia of Christophe (Victoire de la Musique 2002). In 2003, she choreographed the show "Metamorphoses" for the dance school of Marseille.
The same year she also choreographed "Ni Dieu ni maître", a show about anarchist poet and singer-songwriter Léo Ferré, which was presented first at the Théatre Toursky in Marseille, then at the Olympia in Paris.
The show was about music and songs by Léo Ferré (and Elizabeth Cooper). She signed a new version of "Don Quixote" (Minkus-Cooper). Since 2004 she has run her own company, the Pietragalla Company.
In 2006, she presented a show called "Conditions humaines".
In 2007, she began her second year of residency at the Nord-Pas-de-Calais and under the direction of Pierre Cardin created the dance-drama "Sade ou le théâtre des fous". Presented first at the castle of Lacoste in July 2007, this ballet was also given in February 2008 at the Espace Pierre Cardin in Paris.
In March 2009, she presented the show "Marco Polo" at the Palais des Congrès in Paris. In 2011, she reappeared alone on the stage of the Palace with his new creation, "The temptation of Eve", which was originally scheduled to run from 25 January 2011 to 12 February, but was extended until 12 March, after which she went on a tour in France and Switzerland.
She"s currently a judge on Danse avec les Stars, the French version of Dancing with the Stars.