Serenade is a milestone in the history of dance. It is the first original ballet George Balanchine created in America, and is one of the signature works of New York City Ballet’s repertory. In its present form there are four movements: “Sonatina,” “Waltz,” “Russian Dance,” and “Elegy.” The last two movements reverse the order of Tschaikovsky’s score, ending the ballet on a note of sadness.