Strange; I've been asked that before. But no, I don't think of actors while I'm writing. The closest I ever came was with one minor character I was having trouble getting a fix on. So I found a picture in a magazine -- it was one of those ads for hair-restoration for men. I stared at that face until it was the face I saw while I was writing the character. It didn't really help much, so I never tried that again.
And I'd never even heard
of Sharon Stone when I was writing The Renewable Virgin
! But it's interesting that you should see Kelly as a blond.