Prior to the Liberation of Paris in 1944, she was injured by shrapnel whilst was walking in the street. She was able to make a full recovery. Lidova co-established the Les Ballets des Champs-Elysées at the Théâtre de la Ville in the following year. She served as the ballet's general secretary, and worked at the Théâtre des Champs-Élysées, where she devised "Le Dejeuner sur l'herbe" for Petit. Lidova was invited to join Petit's Les Ballets de Paris-Roland Petit he established in 1948 following the two disliking the atmosphere at the Théâtre des Champs-Élysées. Lidova helped Gene Kelly in the casting of the film "Invitation to the Dance" and was an advisor to multiple opera houses putting on ballets, such as La Fenice putting on productions by Serge Lifar and Bronislava Nijinska and Callas in "The Sicilian Vespers" opening the new Turin Opera. She organised a 1947 conference on Vaslav Nijinsky that was promoted by the disproved rumour he had died in Hungary.