Last night, we posted pictures of the costume artwork for Chris Evans' Captain America and now it looks like Collider have got their hands on official concept art for Marvel's other 2011 release, Thor starring Chris Hemsworth. Below are the two Thor pictures, which when compared with the official image released in April, looks to be legit; the chest-plate, hair and cape match up perfectly. Also it's clearly from the same artist as the Captain America image, so it's authenticity isn't reality in doubt... This then, marks the first look at Thor below the waist and now we can see his Wellington-esque (though obviously much cooler) boots. Thor fans might be disappointed to see that these new images do not show NO HELMET!!, which may indicate that Marvel have discarded it from their costume. Indeed it wasn't part of that official image released last year either. Shakespearean actor and director Kenneth Branagh is taking the helm for Thor and despite some stinkers in his filmography recently, we are excited to see what he can do with the Norse God of Thunder. Hemsworth has clearly filled out lately for the role and although he may not be as butch and big as Stan Lee's creation; do we really want to see another ginormous Hulk version of a Marvel hero again? Me thinks not. Thor is due for release on May 6th, 2011, and also stars Natalie Portman as love interest Jane Foster, Anthony Hopkins as Odin and Tom Hiddleston as the villain Loki make-up the core cast of the film.