Kim Cattrall doesn't wear underwear.
The 53-year-old actress - best known for her role as 'Sex and the City's Samantha Jones - believes it is healthier to have "more ventilation" by not wearing knickers.
She said: "My ultimate fashion advice is that it's a proven fact that if you don't wear underwear it's more ventilation and that's maybe healthier."
Kim - who is currently single - also claims she is happy with her appearance and has no desire to turn back the clock.
She added in an interview with LOOK magazine: "I thought in my 40s I was warming up and in my 50s I've taken flight. It's a different world now, thanks God.
"I don't want to look 19. I don't want to look as perfect and beautiful as the fabulous Carey Mulligan. I like the way I look."
Kim recently revealed she is happy to be single because she has her cat, Kobi, for company.
She said: "Home is London because that's where my cat, Kobi, is. I brought her over here. There is nothing better when you are single than you come home and have a cat waiting for you."