Myrcella Baratheon

Myrcella Baratheon is a recurring character in Game of Thrones. She is played by guest star Aimee Richardson and débuts in the first episode of the first season. Princess Myrcella is commonly thought to be the only daughter of King Robert Baratheon and Queen Cersei Lannister. Her real father is Jaime Lannister. Her older brother Joffrey Baratheon is the current King on the Iron Throne.

Background
Princess Myrcella is commonly thought to be the only daughter of King Robert Baratheon and Queen Cersei Lannister. She has an older brother, Joffrey, and a younger, Tommen. The real father of all three children is Jaime Lannister. She often attends tournaments with King Robert.

Season 1
Myrcella accompanies her family north to Winterfell after the death of Jon Arryn. During their stay Bran Stark is severely injured. Myrcella is eating breakfast with her Cersei, Jaime and Tommen when her uncle Tyrion joins them. Myrcella asks whether Bran will die and Tyrion replies that he is expected to live, delighting Myrcella and horrifying Cersei. Tyrion excites Myrcella and Tommen by announcing that he wishes to see the Wall and the “wintry abode of the White Walkers.” He then amuses them by claiming that he wants to urinate off the edge of the wall. Cersei is irritated by his rudeness and leaves, taking the children with her.

Myrcella attends the tournament to celebrate Eddard Stark becoming Hand of the King. She witnesses the horrific death of Ser Hugh of the Vale during his joust against Ser Gregor Clegane. Myrcella returns for the second day of the tournament and applauds when Ser Loras Tyrell unseats Gregor. Gregor attacks Loras and Sandor Clegane intervenes. King Robert calls as end to the fighting. Myrcella joins the applause when Loras declares Sandor a champion.

In the books
In the Song of Ice and Fire novels Myrcella is a quiet, obedient and honest girl, eight years old when the events of the books begin. Her mother dotes on her and is keen that she does not suffer Cersei's fate of being 'sold' in a political marriage without love. Myrcella becomes a more prominent character in later books.

Myrcella is a year younger than Arya Stark, and a year older than Bran Stark.