[3] Devieilhe was born in Ifs, near Caen, France, on 12 December 1985 into a non-musician family – her parents work in special education, although her older sister teaches singing and violin.

[10] Recognised by Jean-Claude Malgoire, Devieilhe debuted as a soloist with the Atelier Lyrique de Tourcoing in October 2011, singing Amina in Bellini's La sonnambula.

[7] In 2012, she was invited to portray Serpetta in Aix-en-Provence Festival's production of La finta giardiniera; she repeated her role in later performances at the Grand Théâtre de Luxembourg and the Toulon Opera.

[18] Later in the year, she interpreted Sister Constance in Christophe Honoré's staging of Poulenc's Dialogues des Carmélites at the Opéra de Lyon, Théâtre Graslin in Nantes, Le Quai in Angers.

[28][29][30] In 2013, she signed an exclusive contract with the music label Erato and released her first recital album devoted to Jean-Philippe Rameau with Alexis Kossenko and his ensemble Les Ambassadeurs.