Lena Headey, who plays Cersei Lannister, and Jerome Flyn, who takes on the role of Bronn, are "not on speaking terms" but it's unsure why.
"Jerome and Lena aren’t on speaking terms any more and they are never in the same room at the same time," a member of the show's crew told the Daily Telegraph.
"It’s a pity because they appeared to have patched things up for a while, but now the word is they should be kept apart at all costs."
This must be pretty difficult to do if the pair are in the same scene, especially as Jerome plays the bodygaurd of Lena's omscreen brother Tyrion Lannister.
It is thought that their romantic relationship is to blame for the hostile situation as the pair were first linked to one another back in 2002 and have both since been involved in other relationships.
Although they have always been coy about their romance, Anne Headey, Lena’s aunt, confirmed that they were once an item.
"We’re not a couple right now, people have seen us together and jumped to conclusions," Jerome said of his relationship with Lena back in 2003. "I can’t rule out a relationship with her in the future, I just don’t know."