The supermodel admits Warhol saved her from boredom at many drug-fuelled parties, as they bonded over their clean living principles.
Hall, who is descended from a long line of US sheriffs, rowed extensively with her long-term partner SIR Mick Jagger over his substance excesses and hates the seediness of the drugs scene.
She says, "Andy Warhol and I used to see each other three times a week for 10 years. We were great friends.
"Andy and I didn't take drugs, so we would hang out together because everybody else took drugs. I hate being stoned and out of it. All the men in my family were sheriffs and Texas rangers, so I'm terrified of going against the law."