Guillaume Connesson, born in 1970, is currently one of the most widely performed French composers worldwide. Commissions are at the origin of most of his works (Royal Concertgebouw Orchestra, Philadelphia Orchestra, Orchestre National de France...) including Pour sortir au jour, commissioned by the Chicago Symphony Orchestra (2013) and Les Trois Cités de Lovecraft (co-commission of the Netherlands Philharmonic Orchestra and the Orchestre National de Lyon). Moreover, his music is regularly played by numerous orchestras (Brussels Philharmonic, Orchestre National de France, National Symphony Orchestra of Washington, Cincinnati Symphony Orchestra, BBC Symphony Orchestra et al.)

He won a Victoire de la Musique award in 2015 as well as Sacem's Grand Prize in 2012. His discography includes, amongst others, two monographs of chamber music and two symphonic monographs on the Deutsche Grammophon label. The first, Lucifer, obtained a ' Choc' from Classica magazine, and the second, Pour sortir au jour, numerous critical distinctions such as the 'Diapason d'Or de l'Année' as well the Classica 'Choc de l'Année'.

After studies at the Conservatoire National de Région in Boulogne-Billancourt (his birthplace) and the Paris Conservatoire, he obtained premiers prix in choral direction, history of music, analysis, electro-acoustic and orchestration.

He has been professor of orchestration at the Aubervilliers-La Courneuve Conservatory since 1997.

From 2016 to 2018, he is in residence with the Netherlands Philharmonic Orchestra as well as with the Orchestre National de Lyon.