The 42-year-old filmmaker says no one has been able to do justice to the actor's comic talent in their movies and he wanted to tap into a different aspect of his Norse God's character.
"I don't think they'd exploited that enough, not only in the Thor films or the Avengers films but in any of the other films he's been in. He's a real comic talent and I felt like that was something that needed to be showcased.
"Thor: Ragnarok" hits the theatres in UK cinemas on October 24 and US cinemas on November 3.