CHARLOTTE — If you happen to hear someone say they saw George Clooney and Matthew McConaughey jogging down Tryon Street in Charlotte, it might have been George Clooney and Matthew McConaughey.

It might also have been two fit, good-looking delegates. Or two fit, good-looking bankers.

Or maybe it was no one. It might have been that the person you heard it from heard it from a co-worker, who heard it from the person who cuts their hair, who heard it from another customer. And the other customer, for all anybody knows, might have made the whole thing up.

This is how it’ll go all week during the Democratic National Convention, among people who care about such things. Dozens of household-name celebrities are in town or arriving soon for official convention activities, private parties, public forums and other events. Some even bigger names have been rumored, from Clooney (still unconfirmed) to Brad Pitt (he seems likely) to Oprah Winfrey (not so much).

And so, for a week, Uptown Charlotte becomes like a mini-Sunset Boulevard.

There are some dead giveaways. If you suddenly see a horde of people swarm into one small area and pull out their cellphone cameras, you are probably witnessing a celebrity encounter. But it’s almost impossible to plan for something like this. As with so many other things in life, the keys to success are connections, timing and dumb-stupid luck.

So, was it Danny Ocean and “Magic Mike’s” mentor? No George. No Matt.