Jack Nicholson.
Funny story. I was at a really fancy shmancy restaurant/bar with my pops in California a few years back, and we were having a few drinks, then a few more...and all around letting loose after a week of shit. About halfway through the night, after we were going to close out, the bartender says "We've got George Lucas and Jack Nicholson in the house!", and we're both kinda o.O eh? We turn around and Jack is standing right there with the creepiest fucking smile on his face. He talked to my dad about his name and how much we hate it for about an hour, and I said a few words about how much I liked his work and how much he scared the shit out of me. He bought us a couple drinks, and went on his way to murder more innocent families.
It was oddly laid-back and a good experience overall. Apparently my dad has seen and spoken to him a few times since then. Very respectful, funny man.