Blaise made his acting debut in Louis Malle's 1974 film Lacombe, Lucien. Malle had been looking for a non-actor to play the titular character in Lacombe, Lucien and was convinced that Blaise, then working as a woodcutter, would bring great authenticity to the role.
Blaise made his cinematic debut in Louis Malle's 1974 film Lacombe, Lucien. Malle had been seeking an individual without acting experience to play the lead role in Lacombe, Lucien and believed that Blaise, who was then employed as a woodcutter, would bring a level of realism to the character.