Question: how old are daenerys and jon snow?
Answer: Age in the books: At the start of the books, Jon is 14-years-old, only a few months younger than half-brother Robb. He's roughly seventeen when he's elected as the 998th Lord Commander of the Night's Watch. In the show, as per HBO Jon is only 7 months older than Daenerys. They are both now 22 years old in the show.