The actors have hardly aged at all.
The only one that seems to have changed a bit is Debra Messing who seems to have thickened up a little (Bless Her ! (That' s Northern "Bless Her"!
))
But so far, I am having a dickens of a time trying to understand what the Karen character is saying -
as I've said elsewhere, I can understand the news reports and most commercials perfectly well - and some of the old TV shows - but I am "losing" a lot of some of the shows now so they are not so much to fun to watch.
Plus DH and DS like to comment almost constantly about shows they are not fond of. A Southern "Bless Their Hearts" on them while doing that!