1) For you who is too young to recognise, first man is Colin Firth as Mr. Darcy from Pride and Prejudice, 1995 BBC mini-series. If you only saw the 2005 (excuse of a) movie, you know nothing. Opinions may vary on what adaptation is better, but it is not the one with Knightley.
2) Surely Joe Dempsie's popularity is not on the same scale as of Tom and Benedict (and originated from Skins), but he is getting a lot of attention for such a small role as Gendry.
3) A clever twist would be to insert David Tennant and 10 Doctor at the end with "well, he is The Doctor"...
but I don't like the actor so I pass.
Update: How could I forgot!