Heather Mills McCartney said she gave Sir Paul McCartney a strict ultimatum as their relationship blossomed: Quit smoking marijuana or forget walking down the aisle.

"I [told him I] would not get married to him if he was taking drugs. I hate it," Mills McCartney, 37, told London's Observer newspaper.

"I could not have him lying to our child [2-year-old Beatrice] about not taking drugs and then going out for a sneaky puff ... He says he had a good incentive."