Guillaume Costanza is an actor trained at the École Nationale Supérieure d’Art Dramatique de Montpellier.
In 2018, he met Arthur Nauzyciel, who invited him to perform in La Dame aux camélias, the director’s first production at the Théâtre National de Bretagne. The following year, he met Angélica Liddell during the École des Maîtres programme and created Histoire de la folie à l’âge classique under her direction.
In 2020, he reunited with Arthur Nauzyciel, who invited him to alternate in the role in Pascal Rambert’s Mes Frères, premiered at the Théâtre de La Colline. He also worked under the direction of Célie Pauthe in Shakespeare’s Antony and Cleopatra at the Odéon-Théâtre de l’Europe.
In 2021, he performed in Sous l’Orme, a monologue written specifically for him by playwright and director Charly Breton, at the Théâtre des Quartiers d’Ivry. In 2022, Angélica Liddell invited him to perform in Caridad, which premiered at the Temporada Alta Festival in Girona.
Alongside these projects, he worked under the direction of Pascal Kirsch in Grand Palais, by Frédéric Vossier and Julien Gaillard, at the Comédie – CDN de Reims and the Théâtre National de Strasbourg.
In 2024, he performed in Olivier Cadiot’s Le Colonel des Zouaves, directed by Ludovic Lagarde. The monologue, originally created in 1997 by Laurent Poitrenaux, was passed on to Costanza by Poitrenaux 27 years later. That same year, he reunited with Angélica Liddell, who invited him to perform in her new production, Dämon (El funeral de Bergman), at the Festival d’Avignon and on its European tour.
In 2026, he performs in Ce soir j’ai de la fièvre et toi tu meurs de froid and in Orlando, directed by Katia Ferreira.
