If it's an actor and an actress it's not to hard (usually) to find their agency address. That's how I search...I have more problems with others. Most of the agencies have listed a list of their clients (not all do) so you can see who is represented by them.
-Urša

There isn't necessarily a secret website or anything like that. Just that in most cases websites with extended info on agency addresses (in which the members themselves usually test the provided addresses) come with a price. StarTiger is probably the best example. Otherwise you search through google, find out who the celebrity is represented by manager-wise or agency and go from there.

Hope that kinda helped.

How does one go about finding a venue address for a celeb? Let's be honest; when it comes to an agency address with no user feedback, or feedback that over a couple of years old, then we're pretty much looking at a dead end.
The example that I want to use here is John Goodman. His talent agency is listed, but the last feedback is from 2005. There are sooooo many listings in which this is the case. What can we do about it? What is a good way of finding alternate addresses? Is there a secret underground of collectors out there who share non-listed addresses of their successes?

I just don't want to give up on some of these celebs, but I'm not sure where to go from here.