Princess Diana cut back on alcohol to clear up her skin

Aug 13, 2014 at 10:59 p.m. ET

Princess Diana's makeup artist is speaking out nearly 17 years after her death, sharing the royal beauty was no diva about her skin care routine.

Mary Greenwell, who had the honor of helping the late beauty look her best, has opened up for the first time about the ways in which the woman who was an actual princess was really just a regular gal with great genes.

Prince George turns one: 5 Things he has in common with Princess Diana >>

"Diana was very aware of her beauty regime, cleansing, toning and moisturizing twice a day," she told Stylist magazine in a "rare" and "exclusive" interview.

"Diana would also be wearing a heavier foundation which is important as women age. I mean heavy in the sense of coverage but still sheer. In your teens and early twenties, tinted moisturiser is fine. But in your 30s, 40s and beyond, you need something more flattering."

PHOTOS: 5 Times Kate Middleton's fashion picks have honored Princess Diana >>

When pressed for specifics on Princess Diana's secrets, Greenwell added, "Diana was very sensible when it came to her skin, she would always make sure she took her makeup off at the end of the day and make sure she always had a clean face before applying makeup."

Sharing she believes not enough women give a solid night's sleep and a healthy diet the attention they deserve, the beauty advisor explained, "After I started working with her, Diana did everything in moderation. She cut back on drinking so her skin was 100%. Women today need to take care of themselves the same way. If you smoke, drink or do anything to excess, you will destroy your most important beauty asset your skin. You must look after yourself."

Unfortunately for those of us willing to put some work into having as great a complexion as Prince William's mother had, Greenwell added, "She had the most incredible skin, which frankly at the end of the day also can come down to family genes."

Lucky Prince George, we suppose!