Grégoire Mour is a graduate of the Conservatoire National Supérieur de Musique et de Danse in Paris and the Guildhall School of Music and Drama in London, after training as a dancer at the Conservatoire de Lyon; he also perfected his theater skills at the Cours Florent in Paris.

As a member of the Studio de l'Opéra de Lyon between 2017 and 2019, he performed the roles of Uldino (Attila) and Abdallo (Nabucco) under the direction of Daniele Rustioni at the Opéra de Lyon and at the Théâtre des Champs-Élysées, the roles of the Prince and the Jester (Respighi's Sleeping Beauty) under the direction of Philippe Forget, and Torquemada (Ravel's L'Heure Espagnole) under the direction of Jonathan Stockhammer; He has also recently performed the roles of Borsa (Rigoletto), Rodolphe (Guillaume Tell), Marshal Trac (Le Roi Carotte by Offenbach) and the Young Prisoner (From the House of the Dead by Leos Janácek) in this same house.

As a laureate of the Royaumont Foundation (2019/2020), Grégoire Mour worked with directors Moshe Leiser and Patrice Caurier on Rossini's operas, a repertoire in which he is particularly at ease; he also took part in a tribute concert to the composer alongside the Lyon Opera Orchestra conducted by Daniele Rustioni, and sang the solo tenor part of the Stabat Mater at the Grand Amphithéâtre de la Sorbonne.

Also a laureate of the Académie de la voix 2020 at the Fondation des Treilles, he received advice from soprano Annick Massis, directors Ivan Alexandre, Alain Perroux and Julien Benhamou.

He was heard at the Barbican Hall in London in the opera Alice in Wonderland (Unsuk Chin) with the BBC Symphony Orchestra, then as an Elder Brother in The Hogboon, a creation by Sir Peter Maxwell Davies with the London Symphony Orchestra and Sir Simon Rattle; he recently sang Gonzalve (L'Heure Espagnole) at the Toulon Opera and made his debut at the Aix-en-Provence Festival as the 4th Jew (Salome).

Also interested in the musical repertoire, he performed the role of Uncle Ian in the world premiere of Bernardo's Pourquoi j'ai mangé mon père?, Bernstein's West Side Story at the Théâtre du Châtelet with the English company Vivo d'Arte, and the title role of Gershwin in a show based on the composer's music.

For the 2022/2023 season: Normanno (Lucia di Lamermoor) at the Opéra de Nice, Gastone (La Traviata) at the Opéra de Lorraine and Mainfroid (Les Vêpres siciliennes) at Festival d'Aix-en-Provence.

Grégoire Mour is represented by the agency RSB Artists since 2019.