Mlada i(Млада) is an opera ballet in four acts, written between 1889-1890 by Nikolai Rimsky Korsakov, with libretto by Viktor Krylov. It was based on a cancelled colaborative opera of the same name which was started in 1872. Rimsky Korsakov derived two works from his version of the opera: Night on Mt. Triglav is an arrangement of Act III. The other work is the Mlada Suite, consisting of several parts of the original work.