The 31-year-old actress - who plays Daenerys Targaryen in the drama series - delighted fans last year with candid pictures of herself and co-star Kit Harington larking around when the cameras had stopped rolling, but fans are in for a disappointment over the coming months as everyone who works on the HBO fantasy saga have been warned about sharing anything online.
"We have a very strict social media ban this year because people need to stop spoiling it for everyone. It's really frustrating," Clarke told the Sunday Telegraph's Stella magazine.
"They've written a number of different endings. So none of the cast know what the actual ending is. If there's ever a leak of any kind, don't believe it because it's probably not true," she said.