Eugene Onegin, Opus 24, in 3 acts, 7 scenes, by Pyotr Tchaikovsky. The libretto was written by Konstantin Shilovsky and the (brother of the) composer, and is based on the novel in verse by Aleksandr Pushkin.

Eugene Onegin is a well-known example of lyric opera; the libretto very closely follows Pushkin's original, retaining much of his poetry, to which Tchaikovsky adds music of a dramatic nature. The story concerns a selfish hero who lives to regret his blasé rejection of a young woman's love and his careless incitement of a fatal duel with his best friend.