Question: who plays the blue guy in thor ragnarok

title: Thor: Ragnarok
text: In January 2016 , with the film beginning pre-production , Ruffalo described it as a `` road movie '' and indicated that additional filming would take place in Sydney . Waititi stated that he was working on the script `` a little bit '' , mainly adding humor to the screenplay , with Eric Pearson joining the project . Pearson felt joining presented many challenges , as `` there were so many puzzle pieces already there , '' such as having Blanchett as Hela ( who was confirmed in the role a month later ) and including Hulk , Valkyrie , and Skurge , that `` they dumped all the puzzle pieces out in front of me and said , ' Build a puzzle ' , basically . '' He was also told not to be restrained by anything from the previous films , and from Waitti , to make the film fun and Thor `` be the coolest character . '' Alexander said in early March that she was no longer sure if she would appear in the film , due to scheduling conflicts with her television series Blindspot . Though she later indicated that this was not the case , Alexander ultimately did not appear in the film , and confirmed that this was due to scheduling conflicts with Blindspot .