The actor is more well-known for his theatrical work, though, and Marvel fans know him well as Erik Selvig, a role he played across the first two Thor films and in Avengers: Age of Ultron.
Skarsgard will presumably play something closer to that role than to, say, his role from both of the Mamma Mia! musicals.
Genre fans will be able to catch him later this year for Denis Villeneuve’s star-studded Dune remake.
(Interestingly, one of his other popular TV roles in the past 20 years was also on HBO, for the comedy Entourage.)