Does that count as a 'met' or a 'saw'?
Back in 1979 I was on spring break from high school in LA with a friend, his dad and his uncle. We saw search lights in the distance and uncle Kenny drove us over there. It was the Coconut Grove and the premiere party for the Muppets Movie was going on. Kenny drove us around to the back of the building, and we got out and walked into some open doors on the truck dock by the dumpsters.
We walked down a hall and found an elevator, so we pushed the call button.
After a couple minutes, the bell goes DING, the doors open, Dick Van Dyke steps out wearing a tuxedo, looks at us, gives a big smile and says "Oops, wrong floor fellas" gets back in, the doors close and off he goes.
Now I wouldn't call that a 'met'. But it sure was fun and gives me a laugh every time I think about it.
By the way, he looked exactly like he always looks! And, shortly after, we were asked to leave the building.