The most notable of Diaghilev's composers was Igor Stravinsky, who is now recognised as the premier composer of the early twentieth century.
Diaghilev had hired the young Stravinsky at a time when he was virtually unknown to compose the music for
The Firebird, after the composer Anatoly Lyadov proved unreliable. Diaghilev was thus instrumental in launching Stravinsky's career in Europe and the United States of America.
Stravinsky's early ballet scores were the subject of much discussion. The Firebird (1910) was seen as an astonishingly accomplished work for such a young artist (Debussy is said to have remarked drily: "Well, you've got to start somewhere!"). Many contemporary audiences found
Petroushka (1911) to be almost unbearably dissonant and confused. "
The Rite of Spring" caused a near-riot by the audience, stunned because of its willful rhythms and aggressive dynamics.
The Rite of Spring had to be pulled after just a few performances. The audience's negative reaction to it is now regarded as a theatrical scandal as notorious as the failed runs of Richard Wagner's Tannhäuser at Paris in 1861 and Jean-Georges Noverre's and David Garrick's
Chinese Ballet at London on the eve of the Seven Years' War. However, Stravinsky's early ballet scores are now widely considered masterpieces of the genre. Even his later ballet scores (such as Apollo), while not as startling, were still superior to most ballet music of the previous century.
Diaghilev commissioned many other original scores, as well as borrowing freely from the existing musical canon. His ballets variously included music by Debussy, Milhaud, Poulenc, Prokofiev, Ravel, Satie, Respighi, and Richard Strauss.