E! Online: Thor: Ragnarok is a guaranteed smash—and not just because Mark Ruffalo's The Hulk will be in it to, well, smash things up. On May 20, Marvel announced that Cate Blanchett has joined the cast as a mysterious and powerful villain named Hela. Other additions to the hit franchise include Jeff Goldblum as Grandmaster, Tessa Thompson as Valkyrie and Karl Urban as Skurge. And it wouldn't be a Thor movie without Chris Hemsworth as the titular character, or without Tom Hiddleston as Loki, Idris Elba as Heimdall and Anthony Hopkins as Odin, Ruler of Asgard.