Besides all the Pet Talkers I've met, who would be considered famous here, I have met:

Mike Dukakis (before and after his Presidential bid)
Bill Clinton (got to shake his hand, he was the most sunburned person I've ever seen that day)
George Lucas (got to go to Skywalker Ranch, we have a picture of Paul and I posing with him)
Jesse Jackson
and many authors, including:
Isaac Asimov - (ran into him in a hallway at an SF convention)
Orson Scott Card
Tami Hoag
John Lithgow
Clive Barker
Neil Gaiman

and, the most exciting (I literally jumped up and down with glee after the photo) you have to go to http://KarenWatts.com to see!