“Game of Thrones” star Kit Harington is coming out from behind The Wall to voice a villainous warrior in DreamWorks Animation’s sequel “How to Train Your Dragon 2.” Brit thesp is also set to star opposite Vera Farmiga in the Sigma/Zentropa thriller “Greenland Time.”Harrington is in negotiations to join returning “Dragon” cast members Jay Baruchel, Gerard Butler, Craig Ferguson, America Ferrera, Jonah Hill, T.J. Miller, Christopher Mintz-Plasse and Kristen Wiig. Dean DeBlois, who co-wrote and co-directed the original 2010 pic with Chris Sanders, is returning to write and direct the sequel. Bonnie Arnold will once again produce, while Sanders will exec produce with DeBlois. Film franchise is based on the book series by Cressida Cowell. Original pic grossed nearly $500 million worldwide and was nominated for two Oscars, including best animated feature. Sequel is skedded for release on June 20, 2014. Harington, who plays Jon Snow on HBO’s hit fantasy series “Game of Thrones,” will once again be seen alongside Sean Bean in “Silent Hill: Revelation 3D,” which Open Road Films will release wide on Oct. 26. Thesp has become a recent favorite of Warner Bros.; not only was he once slated to play King Arthur in its David Dobkin-directed film “Arthur & Lancelot,” but he just filmed a supporting role alongside Jeff Bridges in WB and Legendary Pictures’ wizardry pic “The Seventh Son.” Harington is repped by CAA, Parseghian/Planco and U.K.-based United Agents.