The confidence-boosting effect of make-up is something that Tilbury, who has been wearing cosmetics since she was 13 years old, has professed since early on in her career. “Make-up and skincare have the ability to change the way you feel about yourself – they boost your confidence and energise your mood,” she says. In fact, when her brand was first launched, Tilbury had a monthly makeover column in the Telegraph, where she would work with women of all ages, skin colour and skin types to make them look like subtly enhanced versions of themselves. There were often tears of joy at the end of the shoot days from the made-over readers.

Much of that confidence boost is down to complexion products. Foundations and base products have come on by leaps and bounds in the past decade, to create glowy, sun-kissed and softly highlighted complexions. Tilbury has been key in shaping this change. Her Hollywood Flawless Filter, a priming complexion product that immediately makes you look well-rested and as though you’ve just come back from a holiday (yes, really) is an industry secret weapon and something you’ll find in the make-up bags of women of all ages.

This democratising of beauty is reflected in her advertising campaigns, too. In fact, Tilbury has cast 1960s model Twiggy, 72, as the face of her latest campaign, showing that it makes good business sense to have women of all ages front beauty ads. “Twiggy was creating her own make-up looks before make-up artists existed,” she says.

Bronzer is another product she has popularised. It’s no longer a muddy brown powder used mainly by teens in a bid to look sun-kissed; now we can all look like we’ve stepped off a yacht on the Amalfi coast. There’s a bronzer for everyone. Tilbury has created a brand that transcends generations, from teens to boomers. She tells me beauty isn’t an “exclusive club”. “Everyone can discover the power of beauty, from trendsetting TikTokkers to gorgeous grandparents.”

Last year, mother-of-two Tilbury hit the headlines in an interview with the Daily Mail,where she addressed rumours that her husband, George Waud, a film producer whom she married in 2014, has never seen her without make-up. “I have my bedroom eye. I take off my make-up, do my skincare, then I put on my eyeliner that lasts 16 hours and my mascara.” In an interview with New York’s The Cut in 2016, Kim Kardashian confessed that Tilbury even taught her how to wear make-up “for bed”.

Besides wearing make-up to sleep, which is perhaps quite niche, what is the most flattering make-up for women? When she was formulating her bestselling nude-pink Pillow Talk shade, Tilbury looked at the dominant pink undertones in hundreds of women to find a shade that naturally enhanced the lips. “It makes your eye colour pop and your lips look fuller and wider,” she tells me. In fact, it was the colour this awards season worn by Penelope Cruz, Sienna Miller and Olivia Colman.

By creating a slice of Hollywood glamour in a compact, Tilbury has well and truly cracked red-carpet beauty. And influenced our make-up bags, too – one flattering, glowy complexion at a time.

Four steps to a flawless complexion

1. Start with a rich face cream that will cocoon the skin. Tilbury’s Magic Cream was used backstage at fashion shows years before it became avail­able to buy. You could also try the French pharmacy favourite Embryolisse Lait-Crème Concentré moisturiser
2. Primer is one of those products that seems like an unnecessary extra, but if you want a long-lasting glow, Tilbury’s Hollywood Flawless Filter immediately livens the complexion – you could use it alone as a base, too. Also effective is Bionic Glow by Milk Makeup – try it mixed with your moisturiser
3. If you find the primer has done the heavy lifting for you, just pat on a brightening concealer under the eyes and on any areas of discolouration. Or follow with a light layer of foundation, working from the centre outwards (you seldom need it all over your face). Nars’s Light Reflecting Foundation is a great option
4. A fine layer of bronzer in a “3” shape on both sides of the face works wonders. Start from your temples, curve round to the tops of your cheekbones and back down to your jawline. This imitates where the sun would naturally hit your face, so gives a convincing glow. Add a pop of blush on the cheeks and you’re done. Victoria Beckham Beauty bronzers are great, as are those by Vieve. For blush, try the universally flattering Max Factor Miracle Touch Creamy Blush in Soft Copper.