Queen Cersei I Lannister was the twentieth ruler of the Seven Kingdoms and the widow of King Robert Baratheon, with whom she had her sole
Cersei Lannister. Cersei Lannister is a fictional character in the A Song of Ice and Fire series of fantasy novels by American author George R. R. Martin, and its television adaptation Game of Thrones, where she is portrayed by English actress Lena Headey. In the novels, she is a point of view character.