Guillaume Antonini was born in Avignon in 1979. He studied violin performance at the Conservatoire National Supérieur de Musique et de Danse in Lyon. He plays first violin in the string quartet Quatuor Leonis, founded in 2004. Together, the quartet counted such renowned musicians and ensembles as Valentin Erben, Rainer Schmidt, Eberhardt Feltz, Gábor Takácz-Nagy and the Quatuor Ysaÿe among its teachers. In 2006, it won the third prize of the Foundation “Geneva International Music Competition” – this was followed by numerous concerts at such venues as the Salle Pleyel and the Théâtre du Châtelet in Paris, at the Santa Cecilia Festival in Rome and the Norfolk Chamber Music Festival in North America. In 2008, Olivier Py made the four young musicians “artists in residence” at the Théâtre National de l’Odéon in Paris. This year, they began a residency at the Cartoucherie theatre in Paris. In addition, Guillaume Antonini is a member of the jazz ensemble Swing de Paris.