Yes, Dustin Hoffman. Tootsie, Rain Man, Wag the Dog, and of course, from 1974, LENNY.
"Marijuana will be legal someday, because the many law students who now smoke pot will one day be Congressmen and they will legalize it to protect themselves. I don't smoke pot, and I'm glad because then I can champion it without any special pleading. The reason I don't smoke pot is because it facilitates ideas and heightens sensations - and I got enough shit flying through my head without smoking pot." ~ Lenny Bruce