Watch the 2 toughest 'Game of Thrones' characters sing a love song in this behind-the-scenes video

HBO The INSIDER Summary: Kristofer Hivju and Rory McCann play Tormund Giantsbane and Sandor "The Hound" Clegane on "Game of Thrones." Hivju recently uploaded a behind-the-scenes video of McCann playing a song on the ukulele. The love song is an adorable peek at what happens off set. "Game of Thrones" season seven has been full of spectacle and heart-wrenching moments, but some of the best footage is actually coming from the actors behind-the-scenes videos. Emilia Clarke already shared what is pr...