My uncle was best friends with Mathew Hall (better known as Harry Hill now) in primary school. That's probably the main one. Oooh, my friends parents went to university in Liverpool with the comedian John Bishop and not only that but he fancied my friends mum and made fun of Steve (friends dad) but they ended up getting together xD My uncle keeps running into Matt Smith in London asking for directions xD which makes me very jealous so I said I may just follow him around for a while until he bumps into him again.
Saw Anthony Daniels (aka C-3PO) at a concert once. Also, got to shake hands with Ray Park (aka Darth Maul) at Disney World last year. God, I'm such a nerd...
Got to meet and have a (sort of) one on one conversation with Monica Rial. Twice. And I have a friend who is an up and coming voice actress. I've stated before that she's going to be a character in SAO (not a big character) but she's done other things.
I'm an extra in an upcoming movie, and where I was positioned was really, really close to the main cast. Like, close enough that I might actually be able to spot myself in shots. I got my copy of Prisoner of Azkaban signed by the Phelps twins. I saw George RR Martin at a convention once, unfortunately I was such a noob I actually didn't recognize him. I've seen Jack McBrayer (Kenneth the Page from 30 Rock) perform improv, and I saw the last Second City show of Tim Robinson (one of the newbies on SNL). I also managed to get a current Second City Mainstage actors join me in a song and made him laugh with my dorky dancing. I love being in Chicago :D Oh, and one of my friends from high school was a distant cousin of Ewan McGregor.
You people and your famous people.... I was at The Script concert and I met Samantha Jade (Aus X Factor winner) and The Collective (I think they came 3rd?) took photos with them and everything.
Ugh, Enzy I hate you. ;-; Well, my mom ran into Kareem Abdul Jabar at an airport once (she says was as tall as his crotch, haha) and she worked with a guy who was friends with Alonzo Mourning in college. And my dad's friend's daughter did karate with Taylor Lautner as a kid (allegedly, don't know for sure if there's any truth to that story).
I was hugged by a very sweaty Alice Cooper when I saw him in concert a few years back. I have a signed picture of Johnny Depp as Jack Sparrow. Excuse me, Captain Jack Sparrow. And I even made sure to get a picture of him signing it.