Gustaf Caspar Orm Skarsgård (born 12 November 1980) is a Swedish actor. He is best known outside Scandinavia for his role as Floki in the History Channel series "Vikings" as well as for his roles in the movies "Evil" (2003), "The Way Back" (2010) and "Kon-Tiki" (2012). He also played Karl Strand in the second season of the HBO series "Westworld".