Sebastian MacLean was born in Toronto, Ontario, Canada, as Sebastian Michael John MacLean. At the age of five, his parents left city life behind and moved to a rural part of Canada's East Coast, the small village of Tracy, New Brunswick. It was in the nearby city of Fredericton, where Sebastian first began acting and working in film, later returning to perform in Toronto. Sebastian was mentored by the late Academy Award winning producer, William Vince, on two projects produced in Fredericton and Saint John, New Brunswick. Taking the advice of his mentor, Sebastian began developing his own material by adding writing and producing to his acting experience. Sebastian is best known for his appearances on many popular fictional TV shows and for his work on both sides of the camera in the documentary film Facing Goliath (2006). Although separated in June, of 2016 and divorced on April 14th, of 2023, he was married to Margot Jean Pert on December 27, 1997. They have three children.