The news comes from MovieLine via Vulture along with a rather nice image of what ‘Edmund’ is going to look like! No news if Bella (Kristen Stewart) or Jacob (Taylor Lautner) will appear but according to Vulture Radcliffe will play:
“A sullen teenage vampire named Edmund.”
They go on to tell us that Lisa falls madly in love with Edmund! Should be a great episode which will air November 7th.
Radcliffe will star in Harry Potter and the Deathly Hallows: Part 1 which will be released November 19th (but not in 3d!)