The fourth season of HBO's popular historical fiction drama "Game Of Thrones" is  going to be heavily based on "A Storm of Swords" and "A Feast for Crows," which are the third and fourth books, respectively, in the series penned by George R. R. Martin. And now, the cast has revealed a few spoilers for the upcoming season.

Kit Harington, who plays Jon Snow on "Game of Thrones," told Access Hollywood that things are going to get complicated for Snow in the upcoming season.

"He's a bit in the wars, old Jon Snow. And it doesn't get any easier this season. It's kind of high-octane, action-packed," Harrington said to Access Hollywood

He went on to say that it isn't just Jon Snow who will face violence, as this will be the most deadly season yet.

Season four will have "more deaths this season than any other! ... You'd think they'd tone the deaths down, but they don't. They've realized that's a successful option, so they're just killing more people than they've ever killed," he said.

Peter Dinklage also had high praise for the upcoming season. In particular he is enjoying working with actress Sophie Turner.

"The opportunity to work with Sophie Turner who plays Sansa, I'm working with her a great deal and I love every minute of that. She's incredible," the actor told Access Hollywood.