So when we saw the lovely Katie McGrath at the Monte Carlo Television Festival, we thought we'd have a little chat about what we can expect from the show when it returns.
Katie talked to us about the new cast members (Gemma Jones, Phil Davis and Nathaniel Parker), Morgana's new look and, um, Romanian barmen.
She's rather good at getting us excited about the show, too - everything's "bigger" and "more ambitious", "a lot of things are going to come to a head" and it's the "most exciting" series yet. Okay, so can it start now please?
Watch Katie McGrath chatting about Merlin below:
Are you looking forward to the new series of Merlin? Leave your comments below!