This 'Game of Thrones' actor was virtually unknown before becoming Jon Snow

Fan theories surrounding the death of "Game of Thrones" character Jon Snow are piling as high as the Wall.

Despite a juicy new trailer that hints at Snow's return, we'll have to wait until the show's season six premiere on April 24 to know his true fate.

In the meantime, take a look at how actor Kit Harington came to land the role of a lifetime - and what he thinks of Jon Snow.