
During an interview on 'The Truth About Us', Russell Crowe revealed that some random friend of his named Mickey Castellano - an on-set costume designer - was a drug dealer back in the 70s and used to sell coke to David Bowie. Crowe didn't believe Castellano till he and Castellano were backstage at a Bowie concert.
"We're at this concert and we're backstage. And I'm like, 'Good to see you, David! Hey, can I just introduce you to a friend of mine? Apparently he knew you quite a long time ago? Bowie's face went white. Like white as a sheet, like a ghost. He's just standing there, and he goes, 'Michael!' And it's like, holy s***, what am I witnessing here? Bowie is shaking, he's like, 'Michael, I don't do drugs any more!' and Michael's like, 'David, David, neither do I! You know, I'm 15 years clean!'"
source
