After World War II began, the Ballet Russe de Monte Carlo left Europe and toured extensively in the United States and South America. As dancers retired and left the company, they often founded dance studios in the United States or South America or taught at other former company dancers' studios. With Balanchine's founding of the School of American Ballet, and later the New York City Ballet, many outstanding former Ballet Russe de Monte Carlo dancers went to New York to teach in his school. When they toured the United States, Cyd Charisse, the film actress and dancer, was taken into the cast.