One of the first scenes in the film had Ethan Stiefel dancing as Romeo in the balcony scene with Juliet, in the Romeo and Juliet ballet, with music by Prokofiev. I said to myself, he's very good . He can't be an actor.
So I looked him up. Turns out Ethan Stiefel was a principal dancer of the NYC Ballet and the American ballet theater and co-worked with Baryshnikov in the latter's ABT dance school. He was recognized in 2019 as the greatest active male ballet dancer ! In 2000, when this film was made, he had been a principal dancer at the NYC Ballet and was currently a principal dancer at the ABT. And the the movie credits hardly mentioned him. He also showed himself very well as an actor in this film, and was indeed somewhat of a ladies man.
I can't believe all the "real" actors in this film did their own dancing. There were other "real" dancers in this film , but there was no distinction in the credits, and film editing can be very clever in turning actors into dancers. Nonetheless, I found the film enjoyable, providing insights into the everyday life and competitive pressures of young aspiring ballet dancers.