Sure is her, thanks so much for posting!!! Her look suits that show's styling down to the ground, she looks fab and it's brilliant to see her doing something, hahaha!
I don't think her look is a glare, Karlie's head-down catwalk stomp is rather overt - Tallulah just looks 'normal' to me there. Perhaps in those eds and advertising shots she was asked to stare and glare.. I do prefer her with a shadow of a smile though, and agree that with Karlie dominating the catwalks (and every. single. issue. of US Vogue, for crying out loud, Anna!) she needs to cultivate a look distinct from that!