Christian Slater is convinced his battles with alcohol and drugs stem from a drunken showbiz party - when he was just nine years old.
The actor, 39, has battled with addiction for much of his life, spending time in rehab and even jail because of his wild antics.
And he traces it back to his early exposure to vice - on the road starring in a production of Music Man.
Slater tells GQ magazine, "I didn't get high, but I got drunk. We were travelling around, hitting every state. And every time we would go to a different place, we'd have an opening night party. And it was cute to put me in a tuxedo and run me around. There were glasses of champagne floating around, and four glasses of champagne later..."