Now Arya's a seasoned killer and Maisie Williams is 21. Bran lost the use of his legs but gained a special sight, and Isaac Hempstead Wright is now 19.
Even the grown-ups on the show have changed. Just look at the Lannister siblings. Tyrion gained a facial scar, Jaime lost a hand and Cersei went from long regal locks to a short, don't-mess-with-the-queen hairdo.
Here's a look back at some of the hit show's main characters in season 1, contrasted with how they look now.
Game of Thrones returns to HBO for its eighth and final season on April 14.