Endowed with a sunny voice and great musicality, Julien Behr was not destined to become a tenor on the opera stage. After graduating from the University of Lyon with a Master's degree in Business Law, he decided to put his legal career on hold and study music. He was admitted to the Conservatoire National Supérieur de Musique et de Danse de Lyon (CNSM), where he graduated with a first prize. This change of direction was no accident, as Julien is now considered one of the finest tenors.

From then on, his career took off. In 2009, he was named "Artiste lyrique de l'ADAMI" and made his stage debut at the Aix-en-Provence Festival in the title role of Offenbach's Orphée aux Enfers. Engagements followed one after the other. Julien Behr, whose voice is equally at home in the Mozart repertoire as it is in French romanticism and bel canto, has been invited to many opera houses in France and abroad. The Opéra de Paris, Théâtre des Champs-Elysées, Opéra-Comique, Opéra de Lyon, Opéra de Bordeaux, Strasbourg, Nancy, Besançon, Avignon, Versailles, Metz, Nice, Angers-Nantes and Rennes have all opened their doors to him, as have Venice's Fenice, Mozartwoche, London's Barbican Centre, Flanders Opera, Cologne Opera, Luxembourg's Grand Theatre, Mineapolis Opera and New York's Mostly Mozart Festival.

Highlights of Julien's 2023/24 season include his debut as Roméo in Gounod's Roméo et Juliette at the Theater an der Wien, Cinna in Spontini's La Vestale and Ange Pitou in Charles Lecocq's La fille de Madame Angot at the Opera Comique, and Gerald in Lakmé at the Opéra national du Rhin.

He has performed under the baton of the greatest conductors, including Alain Altinoglu, Louis Langrée, René Jacobs, François-Xavier Roth, Marc Minkowski and Miko Franck, as well as directors such as Olivier Py, Klauss Guth, Robert Carsen and Damiano Michieletto.

Nominated for the 2013 Victoires de la Musique in the category of "Lyricist of Revelation", Julien is also a regular guest on various television programmes. For him, these are an opportunity to share opera with a wider audience and to make opera accessible to as many people as possible.