User blog comment:Emily Windsnap/How old are the Merlin characters?/@comment-82.39.91.84-20180928201432/@comment-2001:14BB:440:6469:9D06:9A66:5BA1:4403-20190105223655

There is no way any of them are more than 25 at oldest at the beginning of the show - Merlin is probably 18 in the pilot episode, Arthur 20-ish and Morgana/Gwen somewhere between 18-23