Day 11: What actor would you love to see guest star on Doctor Who?
I know that there’s been a lot of common casting between the two already, so I really think that it’s necessary for the entire Harry Potter cast to show up over time (even the people who played minor characters and extras). You know, to complete the set. We’ve never met Amy’s aunt, right? I think Maggie Smith would be awesome as the aunt who sent Amy to four psychiatrists and disapproves of her kissogram job. The others could show up in random roles that are totally against type (wouldn’t it be great to see Alan Rickman as a mild mannered civil servant?).
I also think that they’d all get along really well since both casts seem prone to impromptu dance parties.