"The Tsar's Bride" ( ) is an opera in four acts by Nikolai Rimsky-Korsakov, the composer's tenth opera. The libretto, by Ilia Tyumenev, is based on the drama of the same name by Lev Mey. Mey's play was first suggested to the composer as an opera subject in 1868 by Mily Balakirev. (Alexander Borodin, too, once toyed with the idea.) However, the opera was not composed until thirty years later, in 1898. The first performance of the opera took place in 1899 at the Moscow theater of the Private Opera of S.I. Mamontov.