Clément Hervieu-Léger studied drama at the conservatoire in Paris. He enters the Comédie-Française in 2005. Among the roles he performed since then, we can note::
- Oreste, Andromaque, Jean Racine, staging by Muriel Mayette,
- Azor, La Dispute de Marivaux, staging by Muriel Mayette,
- Xavier Lechat, Les affaires sont les affaires d’Octave Mirbeau, staging by Marc Paquien,
- Alcidas, Le Mariage forcé de Molière, staging by Pierre Pradinas,
- Bougrelas, Ubu roi de Jarry, staging by Jean-Pierre Vincent,
- The Prologue, Spark and the page, Fantasio, staging by Denis Podalydès,
- Acaste, Le Misanthrope, Molière, staging by Lukas Hemleb,
- Cébès, Tête d’or de Claudel, staging by Anne Delbée,
- The Frog, the tiger, the man, Fables, La Fontaine, staging by Robert Wilson,
- Valère, Le Tartuffe de Molière, staging by Marcel Bozonnet,
- X, Le Privilège des chemins, Pessoa, staging by Éric Génovèse,
- Sébastien, Twelfth Night, or What You Will de Shakespeare, staging by Andrzej Seweryn,
- The journalist, Une visite inopportune de Copi, staging by Lukas Hemleb.
Clément Hervieu-Léger does not stick to theatre, since he appears in a few TV shows (Madame Le Proviseur, P. J.), TV movies (La Caracole by Marco Pauly, Une Visite inopportune by Don Kent, and La reine des connes by Guillaume Nicloux), and cinema (La Répétition by Catherine Corsini, Gabrielle by Patrice Chéreau).
Very interested in classical music and opera, Clément Hervieu-Léger becomes the assistant of the stage director Patrice Chéreau for a few productions, notably Cosi fan tutte at the Festival d'Aix-en-Provence in 2005, and Tristan und Isolde at the Teatro alla Scala in Milan in 2007. In 2011, he stages his first opera: La Didone, by Francesco Cavalli, at the théâtre de Caen.