Career
Theriault played several roles in several Quebec television series and movies since it debut in the acting industry in 1973. Theriault played the role of Momma, a gimmick. Theriault also participated in the popular movie series Les Boys in which he plays the role of Francois, a doctor and a hockey player of a garage league team
He also played roles in other popular Quebec movies such as Ding et Dong, Le Sphinx, Gaz Bar Blues and television series such as Les Voisins and Omertà: Louisiana loi du silence.
In several of his roles, he played along Marc Messier.