The Unfinished Dance

The Unfinished Dance is a 1947 drama film directed by Henry Koster. It is set in a ballet company, and is a remake of the 1937 French film Ballerina, based on a short story by Paul Morand. It won two awards at the 1948 Locarno International Film Festival.

Aspiring ballerina Meg Merlin idolizes the head of her dance school, Ariane Bouchet, so much so that she often neglects her own studies just to watch Ariane dance. Only the intervention of kindly Mr. Paternos keeps her from being expelled.When she hears that the first lady of ballet, Lady Anna La Darina, is coming to the school, Meg is livid at Ariane being upstaged. She sets out to sabotage Annas stay, beginning with mischief like turning off the lights in the middle of a session. ........

Source: Wikipedia