Gustaf Skarsgård (born 12 November 1980) is a Swedish film and television actor, best known for playing Floki on History Channel's television series "Vikings". He's the son of actor Stellan Skarsgård and brother of actors Bill, Valter and Alexander Skarsgård.
An origin story for Tara Markov (Terra) - pre-Titans - and her brother, Brion Markov (Geo-Force), royals in the nation of Markovia, as they are experimented on my by scientist Helga Jace and battle the Fearsome Five to stop a broader calamity.