Bastien Bouillon began his career in 2009, appearing in the series "RIS," "Central Nuit," and "Boulevard du Palais." His role in the film "Declaration of War" marked the start of a long collaboration with Valérie Donzelli, with whom he later worked on the films "Hand in Hand" (2012) and "Marguerite et Julien," shown in competition at the Cannes Film Festival in 2015.

In 2014, his role in Julie Lopez-Curval's film "High Society" earned him a nomination for the Lumière Award in the Most Promising Actor category. A loyal actor, he worked repeatedly with Dominik Moll, notably in the film "Only the Animals" in 2019 and in the lead role of "The Night of the 12th," presented in the Cannes Premiere section at the 2022 Cannes Film Festival. For this role, he was again nominated, three years after Sébastien Betbeder's film "Up the Mountain," for the César Award in the Most Promising Actor category.