Board Thread:General Discussion/@comment-10870829-20130706015706/@comment-10870829-20130710113235

Christopher Plummer does the voice of Arngeir the Greybeard. He's probably tho most famous person on the voice actor cast

You can see the entire cast here http://www.uesp.net/wiki/Skyrim:Voice_Actors It's impressive how many voice actors they have. Probably just over correcting for oblivion.