User blog comment:Emily Windsnap/How old are the Merlin characters?/@comment-24492510-20141106190512

Arthur comes of age in Excalibur. This means that he is 20 at the start of Series 1 and turns 21 in this episode. At the start of Series 5, he is 27 and 28 when he dies.

We can assume Merlin's age, because he is described as a "young boy" in Series 1-3 and as a "young man" in Series 4-5. This could indicate that Merlin is at least 21 in Series 4 and less than 21 in Series 1-3... So Merlin is at last 2 and a half years younger than Arthur and not more of 3 and a half years younger than him... He is 17 or 18 in Series 1 and 24 or 25 at the start pf Series 5.

The original script says that Morgana is around the same age as Merlino. I think that she seems slightly younger than Arthur, so I assumed that she and Merlin are around 2 years younger than Arthu r. So she and Merlin are 18 at the start of Series 1 and 25 at the start of Series 5.

We have no clues about Gwen's age, but we know that Elyan is younger than her and Angel Coulby is 3 years older than Bradley James and Katie McGrath and 6 years older than Colin Morgan. I think she is around 23 in Series 1 and around 30 in Series 5.

About the knights... Lancelot and Leon are probably slightly older than Gwen, so in Series 5, Leon was in his early 30's. Gwaine and Elyan are probably around Arthur's age. And Lancelot seems to be the younger, maybe he is old as Merlin. Then, there is Mordred... he is probably 11 in Series 1, so in Series 5 he is 18

I think that Nimueh was in her early 70's (as Gaius), even though she seemed in her early 30's. While Morgause was probably around 30 when she first appeared, because she remembered Ygraine.