Naomi Campbell has revealed that quitting cigarettes was harder than she imagined.

The British supermodel, who also gave up drinking seven years ago, admitted that putting a stop on her smoking habit has been harder than giving up alcohol.

"People told me that cigarettes are harder to quit than alcohol. I didn't believe it, but you know what? It is harder," she told US magazine Shape.

The 43-year-old model has used nicotine patches to help get rid of her addiction.

She added: "I don't want to light up inside people's homes, including my own, and I don't want to stand outside on street corners any more. It's still a struggle. In fact, just talking about it makes me crave one, so let's stop, please! But I am really trying."

Naomi - who became one of the elite group of models in the 90s, which also included the likes of Kate Moss, Claudia Schiffer, Cindy Crawford and Linda Evangelista - graced the front cover of the magazine's April issue, showing off her figure in a revealing swimsuit with embellished gold zippers.