The cult classic nail polish loved by Kate Middleton is unbelievably affordable in the Prime Day sales

If there's one thing you can be certain of with Kate Middleton, it's that she will always have an immaculate manicure. But, surprisingly, it doesn't cost a fortune to achieve her signature soft pink finish.

One of her favourite polishes, Essie's Ballet Slippers, is 16% off this Prime Day - and selling fast. A truly timeless nail polish that has been popular for decades, it is the ultimate everyday shade that suits everyone and is suitable for any occasion, as proven by Kate's countless outings sporting the lacquer.

And it's not just the Princess of Wales who loves this shade. Queen Elizabeth was such a huge fan of Ballet Slippers that she requested a bottle of it be sent to the Palace, and it was widely known to be the only nail polish she wore. Anything good enough for the royals is surely good enough for us, especially when it's this cheap...

Essie Ballet Slippers Nail Polish, was £7 now £5.89 at Amazon

This royal-approved polish has been worn by Kate Middleton, Meghan Markle, and even the Queen - and it's now less than £6 in the Amazon Prime Day Sale. Plus, it's formulated to strengthen nails and protect from chips. View Deal

Shop more Kate Middleton-approved Prime Day deals

Nothing beats a pair of the best white trainers and these are Princess Catherine's favourites. Now 50% off, there's no better time to invest in these comfy staples.

One of the Princess of Wales' top skincare products, this oil is responsible for her radiant glow. Rich in fatty acids omegas 3, 6, and 9, it hydrates and smooths wrinkles.

If you want to know how to copy Kate Middleton's makeup , start with this eyeshadow palette. She reportedly loves an Urban Decay Naked palette, and it makes sense considering the typically neutral and soft eye looks she goes for.

Princess Catherine is believed to have worn Ballet Slippers on her wedding day (though back then the shade was called Allure), and she certainly started a pared-back nail trend that brides today love to emulate. Thanks to the sheer finish, it gives the most beautiful your-nails-but-better look that will never date.

And the royal love of Ballet Slippers for wedding manicures doesn't end there - Meghan Markle wore the same shade on her big day too, proving just how universal and refined this shade really is.

This 16% saving might not be the biggest discount we've seen on Prime Day beauty deals , but every little helps when it comes to savings. After you've added Ballet Slippers to your basket, it's worth checking out this Urban Decay eyeshadow discount as well as the impressive Garmin deals on offer before these unbeatable Prime Day deals expire.