I Know Even Less About Ballet Than Opera.

https://news.sky.com/story/us-russian-ballerina-ksenia-karelina-jailed-over-ukraine-charity-donation-released-in-prisoner-swap-13345629

However people do know about Tchaikovsky. He's definitely not a secret.

https://www.youtube.com/watch?v=mkfRbCs15Jc&pp (Swan Lake, Op. 20, Act 2: No.10, Scene. Moderato, André Previn, Warner, Audio, Topic).