Lol! I know! Uma would have been great! Too bad she's not in any mainstream scene (yet!).....and she doesn't really make as many movies as she used to....
Anyhow, I agree....there are older women with beautiful feet....but in this case you see the girl's legs, which are beautiful, smooth and definitely young and toned. It is so obvious that Gilliam must have gone out of his way to get such beautiful legs and feet....there is not the slightest attempt at making her look old....but here's another thing.....though the actress playing the Queen is indeed older (way older than Robin Williams in fact)....within the context of the movie, the Queen's age is not given, and though you can detect some wrinkles, she is actually in headgear and costume....she is not neccesarily presented as an aged woman. But once again, as soon as the camera cuts to the Queen's body with the King, we are presented with a supple, smooth, creamy skinned hottie, that much is very clear. Perhaps Terry himself had a great casting couch session for this very part!!