The royals are renowned for their impeccably groomed appearances, but the methods they use to maintain them are often kept confidential.
However, a few secrets have been revealed.
One princess adores a bee venom, placenta protein and 24-carat gold cream, which is currently discounted from £750 to £95.
Another royal wore a fragrance reminiscent of her would-be mother-in-law’s favourite scent when she first met her Prince Charming.
And one revered monarch couldn’t live without her cherished nail polish, which was personally requested by her hairdresser.
Clarins Everlasting Compact Foundation – £46
Members of the Royal Family typically prefer a minimalist approach to make-up, relying on tried-and-tested products they trust.
This is why Queen Elizabeth favoured Clarins Everlasting Compact Foundation, pairing it with a subtle blush and a touch of lipstick for official duties and engagements.
Yves Saint Laurent Touche Éclat – £31
The iconic beauty staple, Touche Éclat by Yves Saint Laurent, has received widespread acclaim, including among members of royal circles.
‘My routine is very simple – I call it the five-minute face. It’s just Touche Éclat, curled lashes, mascara, Chap Stick and a little bit of blush.
That is my favourite kind of look,’ Meghan Markle told Allure magazine in 2014 – before she met Prince Harry.
The Duchess has also praised the product for its ability to impart a luminous glow during her late-night filming sessions for Suits, the American TV drama she starred in.
Quelques Fleurs L’Original by Houbigant Paris – £135 (100ml)
Introduced in 1912, Quelques Fleurs L’Original is a luxurious fragrance, showcasing an exquisite combination of lush flowers atop a sophisticated base of sandalwood and musk.
Princess Diana selected this scent for her memorable wedding day at St Paul’s Cathedral in 1981.
Bobbi Brown Bronzing Powder – £42
Bobbi Brown’s velvety bronzing powder incorporates coconut oil to ensure it blends seamlessly into the skin.
It’s effortless application is especially convenient for on-the-go use, which Princess Eugenie prefers to do.
In 2016, the royal told Harper’s Bazaar that this shimmer-free bronzer plays a key part in her collection.
‘I do my make-up in the car. I’m really good at doing it on the move,’ she said.
‘I use Charlotte Tilbury and Bobbi Brown – Charlotte’s mascara and Bobbi Brown bronzer. They are geniuses.
Eau Sauvage by Christian Dior – £97 (100ml)
‘He was always sniffing things. Food, roses, our hair. He must’ve been a bloodhound in another life,’ Prince Harry wrote of his father, King Charles, in his memoir, Spare.
‘Maybe he took all those long sniffs because it was hard to smell anything over his personal scent. Eau Sauvage.’
Elizabeth Arden Beautiful Colour Lipstick – £27
Queen Elizabeth was seen applying Elizabeth Arden’s Beautiful Colour Lipsticks on multiple occasions.
The company held a royal warrant from Queen Elizabeth for over 50 years.
It previously told The Telegraph: ‘We work closely with Angela Kelly [the Queen’s senior dresser] and her team to ensure we provide excellent service for whatever Her Majesty requires, or would like to try.’
It is thought that she wore the shades Pink Punch and Rose Petal.