Harington revealed this news on the NBC talk show, The Tonight Show
Game of Thrones stars Kit Harington, Rose Leslie expecting second child
Game of Thrones actor Kit Harington teases Jon Snow spinoff series
Earlier this year, George RR Martin revealed that it was Harington that came up with the idea of continuing Snow #39;s storyline in a new series
Kit Harington, Scoot McNairy, Josh Lucas to star in Blood for Dust
The filming of Blood for Dust will begin filming in September in the US