Joffrey Baratheon

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.

Introduced in 1996's A Game of Thrones, Cersei is a member of House Lannister, one of the wealthiest and most powerful families in the kingdom of Westeros. She subsequently appeared in A Clash of Kings (1998) and A Storm of Swords (2000). She becomes a prominent point of view character in the novels beginning in A Feast for Crows (2005) and A Dance with Dragons (2011). The character will also appear in the forthcoming volume The Winds of Winter.

https://en.wikipedia.org/wiki/Cersei_Lannister