You might think that being a cast member of Game of Thrones entitles you to know all the show's secrets, but Natalie Dormer, who plays Margaery Tyrell, chooses to live spoiler-free. On Jimmy Kimmel Live, she told the host that she stopped reading other characters' story lines and any of the script not relevant to Margaery. "So when the series airs I'm on the couch watching it like you," she says. "It's annoying because I'll find myself in the hair and makeup trailer and I'm like, 'What are you doing here? Oh my god, you're back? I've got to leave!""
As for the Jon Snow will-he-won't-he return saga, Dormer said the promo posters kind of say it all. She also revealed she filmed a lot in Spain which might mean her character, who was last seen thrown in a dungeon with an unknown fate, can be expected to escape in season 6. ("There are dungeons in Spain as well, Jimmy," the actress backtracked, trying to keep a straight face.)
As to the big question about GoT's larger fate—George R.R. Martin's sixth Song of Ice and Fire book is unfinished—the show will press on without the book. "Maybe A to B they go off slightly different tangents," Dormer explains, "But B is still B."