<P> Tommen Baratheon is portrayed by Callum Wharry and Dean - Charles Chapman in the HBO television adaptation . </P> <P> Prince Tommen Baratheon is the brother of Joffrey and Princess Myrcella and is second in line for the throne . Tommen is Queen Cersei Lannister's youngest son and, like his siblings, he is also the son of Cersei's brother Jaime Lannister, but he is unaware of this, as he believes Robert Baratheon to be his father . Tommen is described as plump, kind, and weak - willed, though he tries hard . He loves his kittens, and is kind hearted . </P> <P> Tommen is seven years old at the beginning of A Game of Thrones (1996). He is the youngest child of Cersei and Jaime Lannister . </P> <P> Tommen Baratheon is not a point of view character in the novels, so his actions are witnessed and interpreted through the eyes of other people, such as his mother Cersei Lannister, his uncle Tyrion Lannister. and Sansa Stark . Tommen is mostly a background character in the novels . </P>

How old is joffreys brother in season 4
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