WHY YES I'VE DONE IT WITH THE ENTIRE CAST OF MAD MEN.
The general answer to this question always seems to be a coy, "Yes, I've done it with someone famous but for the sake of decency I won't say who it is." What's the point of that? Other than trying to convince people that you've got the shine of celebrity on your dick while using the fact that they're famous as an excuse not to say anymore. You know what's equally effective? Not mentioning it in the first place.