Arya and Melisandre's Final Conversation Ignites 'Game of Thrones' Theory Regarding Cersei

As we inch closer and closer to the big series finale of "Game of Thrones," one huge question remains: Who will be the one to take out Cersei Lannister (Lena Headey)?

She's basically ticked off everyone in the seven kingdoms at this point and they're all coming for her after the Battle of Winterfell. But could a conversation from last night's episode possibly clue us into which character will do the deed?

In a theory currently blowing up on Twitter following Sunday's shocking installment, fans believe Arya (Maisie Williams) could follow up her takedown of the Night King by executing Cersei next.

The theory involves the conversation Arya and Melisandre (Carice Van Houten) had after the former escaped an onslaught of White Walkers inside Winterfell. Arya recalled running into the Red Woman way back in season three, "You said I'd shut many eyes forever," she remembered.

Melisandre's response: "Brown eyes. Green eyes. Blue Eyes."

We now know the "blue eyes" were referring to the Night King, with many viewers believing the "brown eyes" belonged to Walder Frey (and probably a ton of other people, it's a pretty common color). But the "Green Eyes"? Welp, look who has those:

Some have noted that Littlefinger's eyes were also kinda green, adding that it seems unlikely Arya will take out the two biggest threats of the show herself in its final episodes. The repeating of those words could have just been to steer Arya toward the "blue eyes" and her destiny of killing the White Walker king.

The only people left on the youngest living Stark child's kill list are Cersei, The Mountain and The Hound -- but do you think she'll actually take out any of them? We're guessing those last two are going to battle each other, with one of Cersei's siblings finally ending her reign.

See more fans reacting to the theory below. "Game of Thrones" airs Sundays on HBO.