I like pictures in my games, and I like using screencaps or set photos of actors from movies to "cast" assorted characters.
I've found a very handy website for anybody else who may want to do something of the same; its not complete or perfect, but it should suit most GM's needs if they want headshots from filmdom. They're updating all the time, from the looks of it, and the selection runs from major motion pictures to obscure novelties (mostly British, from the looks of it) down to specific episodes of old TV shows. I think there's some reviews too, but I ignore most of them because A) that's not what I'm there for B) the reviewers taste is...weird.
Check it out: http://www.aveleyman.com/Default.aspx