[10] In Complices (Accomplices) he starred as the murdered male escort whose final weeks are shown interspersed with the investigation to find his killer;[11] this gained Descours a nomination to the César Award for Most Promising Actor in 2011.
In a short that year he played the lead singer in a pop group, Boys Band Théorie and also sang the theme song by Alex Beaupain.
[17] Leading and starring roles followed, in films - Ciel rouge (Red sky), shot entirely in Viet Nam, as Philippe Merlen, a French sergeant who deserts to save a Viet Minh prisoner, which results in a brief romance, Les Gardiennes (The care-taking women) as Georges - and television dramas such as Peur sur la base (On the base of fear) as a naval rating suspected of murder, Mystère au Louvre (Mystery at the Louvre) as Frédéric Delage, an acrobat who becomes involved in a daring jewel theft, the mini-series Laëtitia, based on real events, as Judge Martinot, and in another series De Gaulle, l’éclat et le secret (De Gaulle, the splendour and the secret) as Geoffroy Chodron de Courcel.
In 2015 with three other actors (and musicians) he formed a group to practice non-verbal theatre skills on a regular basis;[20] this resulted in productions seen in Paris and Barcelona.
[7] Cyril Descours is a black belt in karate 2nd Dan, having started at the age of 12,[16] and also practices swimming, roller skating, snowboarding, tennis and riding.