Cersei Lannister is in A Song of Ice and Fire.
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 Lena Headey . In the novels , she is a point of view character . She subsequently appeared in A Clash of Kings ( 1998 ) and A Storm of Swords ( 2000 ) . In the story , Cersei Lannister , Queen of the Seven Kingdoms of Westeros , is the wife of King Robert Baratheon .