Cersei Lannister is a United States senator.
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 . She becomes a prominent point of view character in the novels beginning in A Feast for Crows ( 2005 ) and A Dance with Dragons ( 2011 ) .