There’s no doubt at all that JK Rowling has one, and Oprah, Jemima Khan and Gwyneth, too, for that matter. What is it that they have in common? They all have an expensive face. You know, the kind of face you look at and just think money, as if they have ground up dollar signs and used them as an exfoliator.

Rowling recently admitted she’d felt the need – after much media criticism – to smarten up her grooming act: “Maybe my mother was right, and I do need to put my hair back and tidy myself up a bit. But I often resent the amount of time it takes to pull yourself together to go on TV…”

An expensive face takes time to achieve – and a long-term approach too. This is not the old-school expensive face: overlifted, overfilled and over-Botoxed, with skin that looks paper thin. That kind of face has obviously had a lot of money spent on it, but it is so odd that you wouldn’t know quite where to look if one looked at you. What is expensive now is a face that looks healthy, glowing, natural – and flawless.

“Women with expensive-looking skin are willing to use only the crème de la crème of the beauty industry, and they keep us guessing. It’s about having less cosmetic work,” says the facialist Amanda Lacey.

Georgia Louise, another face perfector, agrees that the parameters have changed: “Today, a wealthy face is considered to have a natural, dewy glow from living a healthy lifestyle from the inside out. A wealthy face is radiant from your inner health: eight hours of sleep, no smoking, eating healthy, organic food, working out, using the best-of-the-best skincare products and having little stress. Women with wealthy faces know their skincare ingredients and products, and take their home regime seriously. It’s more about cleansing, toning and moisturising, layering up with super-serums and being in bed by 10pm with an overnight face mask on. And they see their facialist more frequently than their manicurist.”

This really is a 360-degree approach to beauty. It isn’t about simply going to a cosmetic doctor for a quick fix, it’s about a fully integrated approach to making your face look as youthful as possible for as long as possible – and all the experts seem to agree about how it’s done.

Exercise is definitely the first step. “By moving your body, your blood flows better: it’s a powerful and wonderful way to assist your body in eliminating toxins,” says James Duigan, founder of Bodyism and author of The Clean and Lean Diet series. “Even sweating is a great deep cleanse. Breathing properly, deep into your belly, is crucial to maximise the beauty effect of exercise: the oxygen cleanses your body on a cellular level and also energises you naturally and immediately.”

Cosmetic doctor Michael Prager, from the UK, says, “In most cases, these women are extremely knowledgeable about what they put in their mouths, and they haven’t just been doing it for a week, but for a long time. If you want to look expensive, it’s a lot of lifestyle work, which, in turn, minimises the face work. And that face work should be minimal and not too often, but regular.” Dr Prager recommends starting ‘face work’ relatively young, in your mid-thirties, so, rather than trying to fix ageing damage, “good early work means that you’re preventing it”, he says. Key treatments include something that provides deep hydration, such as mesotherapy, and Botox in the lower face to prevent jowls. As for fine lines and wrinkles, they’re “charming and natural, so you’d leave those”.

Interestingly, even Mary Greenwell, make-up artist to the stars and fragrance maker, doesn’t immediately start talking about products to create this look. “If you’re rich, you can afford to sleep, so do it,” she says. “The most important thing is eating well and sleeping, it really is – all those green juices and vitamins. I can tell straightaway if a woman does this.” Combine this with well-layered skincare (primers, serums and moisturiser) and “you’ll have the richest natural glow, and you’ll need very little foundation on top”.

When it comes to products, British make-up artist Charlotte Tilbury has this advice to make yourself look as luxe as possible: “The quality of make-up you use can give a more refined look and make you appear younger. For an expert finish, use what the experts use. Powders work better with brushes made of real hair, cream textures work better with synthetic hair. Also, where most people fail is in the quality of the powder and eye-shadow texture. It’s the difference between sleeping on cheap nylon sheets or expensive Egyptian cotton with a high thread count. Use eyeshadows with emollients such as rose wax and almond oil to hydrate the skin. These apply and set like a second skin, rather than blotching and smudging. Opt for powders that are finely milled: they go on like silk and smooth out lines and pores, rather than sitting on them and ageing you.” And for pricey-looking lips: “Choose lip glosses that are super-hydrating with highly pigmented colour. They give a polished, professional finish.”

Don’t forget your crowning glory. “Expensive-looking hair is a mixture of components,” says Nicola Clarke, colour director at John Frieda. “It’s even, fresh colour, whether you are blonde, brunette or red; no regrowth or dry, frazzled ends; a good shampoo and conditioner; a great blow-dry; and a few hair extensions to help give a full and expensive look. Extensions last longer and can be matched perfectly to your own colour, which is really important or you can look like you have a dead animal attached to your head. But an expensive-looking woman doesn’t leave the house with roots or without a blow-dry.”