Roy Dupuis was born on April 21, 1963, in New Liskeard, Ontario. He spent a significant portion of his childhood (from early infancy until he was eleven years old) in Amos, which is in a region of Québec called Abitibi. For the next three years, he lived in Kapuskasing, Ontario, where he learned to speak English. His father (now deceased) was a traveling salesman for Canada Packers, a meat company (now part of Maple Leaf Foods). His mother is a piano teacher. He has a younger brother and an older sister. When he was fourteen, after his parents divorced, his mother moved the family to Sainte-Rose, Laval, Québec (in the greater Montréal area), where he finished high school. After high school, he studied acting in Montréal, at the National Theatre School of Canada (L'École nationale de théâtre du Canada), graduating in 1986.
