HBO
Coster-Waldau mentioned that he had learned about a series of theories that predict how Cersei will die on "Game of Thrones" - including one that predicts Jaime will kill Cersei.
Coster-Waldau, it seems, is a fan of this theory.
"It makes sense. He killed the Mad King and now he's killing the Mad Queen," Coster-Waldau told InStyle.
The theory Coster was referring to in his interview is an interpretation of the "valonqar" prophecy. The "valonqar" prophecy is only mentioned in the "Game of Thrones" books, when Maggy the Frog tells a young Cersei that she will die at the hands of the "valonqar."
"Valonqar" is a High Valyrian word that translates into "little brother."
The prophecy is often thought to indicate that Tyrion will kill Cersei, since he is younger than Cersei. But Jaime, despite being Cersei's twin, was technically born after Cersei, making him younger than her by minutes. This has led fans to believe that Jaime might be the "valonqar" Maggy was referring to.
However, the fact that Cersei is pregnant is something that keeps the actor from totally loving the idea of Jaime killing Cersei. "It'd be like the Red Wedding 2. That would be really horrible. I hope he wouldn't," Coster said.