As Cersei Lannister from Game of Thrones, however, she's perhaps the paragon of drunken cruelty. This is, after all, the woman who so sweetly said to Margaery Tyrell, "If you ever call me 'sister' again, I'll have you strangled in your sleep."
In front of the studio audience, Headey manages to maintain remarkable composure as she insults Kimmel's sexual prowess, among other things. She's all glares, eyebrows, and heart-chilling smiles. Even the host flubs one of his barbs in the face of that.
Then again, Kimmel's no Tyrion. (E!)