(I hope this spawns parody threads, hopefully sexual in nature).
But. I think when we see actors in shows, because they are rehearsing memorised lines it can be difficult to know how intelligent they are. It is when they are put on the spot in interviews and through their non-rehearsed humour etc.. that we can somewhat gauge their intelligence I think.
For example, I get the impression from interviews etc. that Patti LuPone is quite intelligent and Bernadette Peters (who I adore) not quite as much.
Now, I know we could argue why does it matter or what is intelligence (and if you want to, feel free), but I am interested to know which actors "got it" and which actors "aint".
Give me claws and a hunch, just away from this bunch.