How old was Aria in season 1 got?

How old was Aria in season 1 got?

Arya was born in 289 AC (“”After (Aegon’s) Conquest””) as the third child and youngest daughter of Lord Eddard and Lady Catelyn Stark of Winterfell, the ruling liege of the North, and is nine years old at the beginning of the book series and 11 in season 1 of the show.

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