Many viewers are interested in how old Emilia Clarke was at the beginning of Game of Thrones, and this question is really interesting. And all because in the book Daenerys is noticeably younger than both the actress herself and her screen version.
So, Emilia Clarke was 25 years old during the filming of the first season. She was young, but quite mature compared to the book Daenerys, who was only 13 at the time of her first appearance. In Game of Thrones, the heroine's age increased to 16-17 years old, and by the final episode she was about 24.
Such a move with increasing age and choosing an older actress is not uncommon, especially if the character has a difficult path to go through. In the case of Game of Thrones, this allowed to avoid ethical issues and make the heroine's development more convincing.
