Who's the most famous person you've ever met?

I don't get autographs. I don't want to bother them. The only famous person I have ever talked to was Bob Evans because he was kind of a family friend. Having common ground gave me something to talk about and not seem like just another nitwit. That's not to say that people that get autographs are that I just don't like bothering people.

Edit: oh and John Glenn but same circumstances applied.