When it comes to Game of Thrones, viewers understand that no character—not even the most beloved—is immune to being killed off (and often in a brutal way). While few people would describe Cersei Lannister as "beloved," she is one of the series' key antagonists, and a big part of what makes the show tick. And while she seems pretty certain that she'll be left standing when winter comes to an end, a fan theory is predicting that Lena Headey's character will be one of the many who will bite the dust by the time season 8 is over.

To fully understand this theory, we need to go back to season 5's "The Wars to Come," when—in a flashback—we see a young Cersei meet with fortune teller Maggy the Frog, who reveals the prophecy for future Queen's life when she tells her: "And when your tears have drowned you, the valonqar shall wrap his hands about your pale white throat and choke the life from you." Valonqar means "little brother" in High Valyrian, and many have taken that to mean that either Jaime or Tyrion will ultimately be the one to kill Cersei. However, this newest theory poses a different idea entirely.

Redditor Namez_Are_Hard suggested that it may not be Cersei's literal brother who kills her, but the little brother of her children:

"What if she’s pregnant with another son, and while giving birth to him, she dies. She is killed by the Valonqar. Nowhere in Mag's prophecy does it say HER valonqar, just THE valonqar."

The child would be the younger brother of Cersei's three already-dead children—Joffrey, Myrcella, and Tommen—and many fans are wondering if it could potentially be their "little brother" who ends Cersei, and not her younger brothers.

The theory is certainly interesting. We'll be waiting to see how—and if—Cersei meets her fate.