He was librettist for the ballet, "Romeo and Juliet," in the Kirov State Theater of Opera and Ballet in Leningrad, Soviet Union with Constantin Sergeyev (Romeo); Galina Ulanova (Juliet); A.V. Lopukohov (Mercutio) and S.G. Karen (Tybalt) in the cast. William Shakespeare was writer. Sergei Prokofiev was composer. Leonid Lavrovsky and Sergei Prokofiev were librettists. Leonid Lavrovsky was choreographer. Piotr Williams was set designer.
