This is Kristian Nairn, AKA Hodor, Djing:
Before Game Of Thrones he was a famous DJ and now he's Hodor and also still a famous DJ.
This is him looking like what a DJ might look like.
And here a younger version of his DJ self:
Here he is with Kelly Clarkson:
And here he is with a giant cuddly dog:
Listen to him talking about his music career as well as a bunch of other things because he can actually say words other than "HODOR!"
Interview courtesy of ComicBookMovie.com.