Meredith Woerner explains:

Last year, we witnessed The Simpsons give tribute to Game of Thrones in their introduction. Now, the cast of George R.R. Martin's series has invaded Springfield, and it is awesome.

Created by artist Adrien Noterdaem for the Draw the Simpsons Tumblr, this may be our favoriteGoT mashup in sometime. Especially with Tywin Lannister in the Mr. Burns pose. 

Hodor

I see an uncanny resemblance...