Biography
Théo Costa-Marini is a French actor. He trained at the ENSATT in Lyon and has worked in theatre under directors including Simon Deletang, Matthias Langhoff, Évelyne Didi, Jean-Philippe Albizzati, Théo Kailer and Aurélia Ivan. In 2011 he appeared at the Festival d’Avignon in the play Lyon-Kaboul-Thèbes aller retour, Œdipe tyran.
His screen credits include the films Bastille Day (2016) as Xavier, Jessica Forever (2019) as Trésor and Case 137 (2025) as Arnaud Lavallée, and the series Black Spot (2017–2019) as Roman Barthélémy, Women at War (2022) as Adjudant Bernard Bergeret, Andor (2025) as Dilan and The Walking Dead: Daryl Dixon (2024) as Mathis. He is also credited as Ernest Defarge in the 2026 series A Tale of Two Cities.
