I would describe Anya Taylor-Joy's performance as being the sort of performance on an actor like Ryan Gosling could pull off. It's all in the eyes and subtleties in the face. Similar to Gosling in drive she is often quite quiet and with those piercing eyes, it makes when she speaks feel that much more important.
Also it's hard to believe that's the little kid from Love Actually. I know he's been in other stuff, but the cowboy look and the accent...you wouldn't even think he's kind of a goofy looking Brit.