Prélude à l'Après-midi d'un faune (L. 86), known in English as Prelude to the Afternoon of a Faun, is a symphonic poem for orchestra by Claude Debussy, approximately 10 minutes in duration. It was composed in 1894 and first performed in Paris on 22 December 1894, conducted by Gustave Doret. The flute solo was played by Georges Barrère.
The composition was inspired by the poem L'après-midi d'un faune by Stéphane Mallarmé. It is one of Debussy's most famous works and is considered a turning point in the history of Western art music, as well as a masterpiece of Impressionist composition.