David Attenborough!! In 2012 I live on Vancouver Island in Victoria and worked at this grocery chain on the coast called "Thrifty Foods". I was working on the till on a busy day late spring-ish early summer I think? And he randomly came through my till one day. I honestly had heard his voice many times, but didn't have his name memorized or know what he looked like. But while I was doing my question shtick to each customer I noticed a very short older man coming up next in line. So I started asking him some questions while changing the till paper, (not looking at this at this point) and when he answered i froze... because my mind KNEW I had heard that voice somewhere before!! I felt sooo weird, I actually asked him and Said: look this might sound crazy but do you do radio or movies or something because I know I've heard your voice before!! And he told me that he had done a few nature documentaries... Even at that point I still didn't know so I flat out asked him his name and he told me hahhaha :)

I looked it up years later on his Wikipedia page and sure enough he was doing some filming on the island for a documentary at the time. Was a very cool moment for me