The actress, 59, is known for her willingness to bare all.
She was awarded the title, and a rose bowl, by British Naturism.
She said: "Many thanks to British Naturism for this great honour. I do believe in naturism and am at my happiest on a nude beach with people of all ages and races."
The Oscar-nominated actress has said she hates the British attitude towards nudity.
"I hate the British attitude to public nudity. The sniggering Carry On mentality ... so hypocritical, so uptight - such a manufactured scandal," she said.