Fantastic on Vikings
He is a great addition to the show. Plays Bjorn very well and his fight scenes toward the end of the season were acted with a real physicality. I have only seen him in 'The Hunger Games' and he didn't really get a chance to flex his talent there.
EDIT-- I'm not sure of the future format of the show at this point. Though, I wouldn't be against a Bjorn spinoff. Or a continuation after Ragnar's death.
"Prince Rhaegar loved his Lady Lyanna and thousands died for it."