Game of Thrones star Lena Headey, better known as Cersei Lannister, reportedly refused to appear on-screen with co-star Jerome Flynn after a terrible real-life breakup.

According to Page Six, Headey requested the show’s makers to ensure that she and Flynn wouldn’t have to be in the same room together.

The report further revealed that Lena “appears to have a genuine hate towards him [Flynn].”

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However, the two kept their bitter feelings about each other under wraps on the sets for the past eight years and have never appeared in a scene together. But that did not stop things from getting awkward sometimes.

The actress dated Flynn, who plays Bronn, before the show first aired in 2011.