It could have been Tchaikovsky’s first ballet.
But, it wasn’t. It never came into being at all. Ann Nugent explains:
“In 1870 he had occupied himself with large-scale ideas about writing a four-act ballet Cinderella, though he seems to have abandoned them fairly quickly, leaving no trace of any music he may have written for it.”
– Swan Lake, Barron’s Educational Series, Inc. 1985, p.14
Tchaikovsky, did, of course, later compose a mini version of the Cinderella story for the wedding scene in The Sleeping Beauty.
Here’s a clip of American Ballet Theatre‘s Courtney Lavine and Calvin Royal III performing to a piano arrangment of that piece in Alexei Ratmansky’s version of The Sleeping Beauty at Works & Process at the Guggenheim.
Do you wish Tchaikovsky had composed a full-length score for Cinderella?