From "The Bottom Line":
"I heard a very funny story recently about John Macarthur that has a real Hollywood buzz about it. Macarthur was recently interviewed on Larry King and upon arriving at his office the next day he was interrupted by a phone call. The caller said "my name is Guy Ritchie and I need to speak to you". Macarthur being so culturally savvy responded "Guy who?".
Guy Ritchie: Guy Ritchie, I'm Madonna's husband!
John Macarthur: Madonna who?
Guy Ritchie: I need to speak with you. Can you come out to my place?
John Macarthur: Sure thing..."
The rest can be read here...