9) Cersei Lannister (Lena Headey) – Game of Thrones

Cersei Lannister was written as a ruthless ruler who always put power above everything else. Lena Headey kept that sharp edge but gave Cersei moments of vulnerability that made her feel more complicated. Instead of always being in control, Headey let cracks show, especially in scenes with her children. She wasn’t just driven by ambition—she was terrified of losing what little control she had. This made her more relatable, even when she was doing terrible things. Headey also played up Cersei’s insecurities, often using small gestures, like touching her wine glass or looking away, to show doubt.
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