Grey Worm has been cast. The one on the left plays Daario and the guy on the right plays Grey Worm. You could see Ian McElhenny in the background of some the the Dany shots/pictures this year sporting a nice white beard. I will hunt around and see if I can find an image. Here is one - He is in the background with the actress that plays Missendei (spelling). I found it on Winter is Coming.