Graham McTavish is the voice actor of Loki in the Avengers Earth's Mightiest Heroes series, and was born on January 4th, 1961 in Glasgow, Scotland. He is a Scottish television and film actor, best known for his roles as Dougal Mackenzie in the popular TV series "Outlander", as Dwalin in the "The Hobbit" trilogy for Peter Jackson as well as the Saint of Killers in AMC's series "Preacher", based on Garth Ennis and Steve Dillon's cult comic book series.