I can't think of any celebrity I've met. I just don't go out of my way to meet famous people as it doesn't interest me.

I know lots of radio people, a few I have met that come to immediate mind are Iain Stables, Jason Reeves (really nice guy too), Jay Jay Feeney, Dominic Harvey, Sarah Gandy...and some more who I can't think of at the moment :)

Steve Wozniak a few years ago in Auckland 2016... well didn't really meet him but asked him a question from the audience. 

Did anyone else go to that?

MikeB4: Michael Cullen, my cousin Graeme Dingle, Jenny Shipley, Helen Clark, Richie McCaw, Tana Umaga, Trevor Mallard.

I had Trevor Mallard as one of my Teachers at Taumarunui High School

I have met Penn and Teller after a show in Vegas, they stood in the exit hall for as long as it would take so anyone could chat to them, get an autograph, or a photo. Hell of a nice pair

Been on What Now when it was filmed in Wellington

Had a beer with Gordie Howe (Canadian Hockey Superstar) after a USA vs Canadian greats exhibition match in Detroit.

Grahame Dingle was "Boat Captain" when I went white water rafting down the Tongariro

Andy Hertzfeld (helped design the original's Mac)

Helen Clark 

And I saw

Possum Bourne at events and as a function guest speaker
Hayden Paddon
Frank and Lauren Kelly
Steven Biddle before he was famous.

Passing celebrities in public I generally won't bother them as I figure they are trying to go about their lives.  That's assuming I even recognise them in the first place.

Now that I think about it, I met Terry Pratchett years ago when he came here to do a talk and a signing. So I shook his hand, had my book signed, usual meet n' greet stuff. I was too shy to try to strike up a conversation with him. Like, what am I going to say? "I really like your books!"?!