Mila Kunis - dumb as a rock, but eminently boneable.
I saw an interview with her once where she said that it was Macaulay Culkin who finally convinced her to sit down and watch and episode of Family Guy... a show she provides voice action for... ugh. She said she found it kind of funny.
The thing which really got me, though, was her role in American Psycho 2. Every single person who participated in that film in any way ought to be severely beaten with canes.