Sergei Pavlovich Diaghilev (1872–1929) was a Russian ballet impresario and art promoter, best known for founding the Ballets Russes, which revolutionized ballet and had a profound influence on music, dance, and visual arts in the early 20th century. Although primarily recognized for his contributions to dance, Diaghilev played a crucial role in the collaboration between composers and choreographers, thereby impacting the music landscape. His notable works include the ballets "The Firebird" (1910) and "Petrushka" (1911), both featuring compositions by Igor Stravinsky, who became a key collaborator. The Ballets Russes also presented "The Rite of Spring" (1913), which sparked controversy and is considered a landmark in 20th-century music for its innovative rhythm and orchestration. Diaghilev's impact on music extends beyond ballet; he fostered a modernist aesthetic that influenced composers, artists, and choreographers worldwide. He promoted the integration of different art forms, paving the way for future collaborations in theater and opera. His legacy is evident in the continued relevance of the works he championed and the ongoing influence of the Ballets Russes on contemporary dance and music.