1880-1942. Russian dancer and choreographer, born in St Petersburg. He was chief choreographer to the Ballets Russes 1909-14, and with Diaghilev revitalized and reformed the art of ballet, promoting the idea of artistic unity among dramatic, musical, and stylistic elements. His creations for Diaghilev include Les Sylphides 1907, Carnival 1910, The Firebird 1910, Le Spectre de la Rose 1911, and Petrushka 1911.