Question: how old are arya and bran?
Answer: At the start of the first book, she is 9 years old. Robb and Jon are 14, Sansa is 11, Bran is 7 and Rickon is 3. By the end of The Dance of Dragons (current last book as of February 2018) she is 11. In the TV series, all of the children are aged up by about 2–3 years, whilst the adults appear a lot older as well.