Delphine Moussin entered l'Ecole de danse de l'Opéra in 1980. She joined the Paris Opéra Ballet Corps de ballet in 1984, when she was 15 years old. She was promoted to Première danseuse in 1995 and to Etoile in 2005 after her performance in Cinderella.
Main roles in Neumeier's Magnificat, Sylvia and Midsummer Nights Dream. Nureyev's Don Quixote (Kitri), Sleeping Beauty (Princess Florine), Swan Lake (Odette-Odile), Raymonda (Clémence), La Bayadère (Nikiya and Gamzatti) and Cinderella. La Sylphide (title role and Effie), Giselle (Myrtha), Woundwork 1 by Forsythe, Doux mensonges by Kylián, Coppélia by Bart, La Brambilla - Le Concours by Béjart, Shéhérazade by Li, La Petite danseuse de Degas (L'Etoile) by Bart, Webern, Opus V by Béjart, Manon by MacMillan, Symphony in C, Les Quatre tempéraments, Sérénade, Liebeslieder Walzer by Balanchine and Ivan the terrible (Anastasia) by Grigorovich.