This is going to sell out fast.

Kim Kardashian West has been spilling the beans on her skincare must-haves and one of the products she can’t get enough of is a €9.80 skin serum by budget online brand The Ordinary.

The reality star gave a shout out to Granactive Retinoid 2% Emulsion in a post on her website called, ‘How I Slow the Aging Process.’

“In any skincare routine, anti-aging products are so important,” the post reads.

“They can have so many benefits, like reducing dark spots, preventing wrinkles, smoothing fine lines, and so much more.”

Among the 15 products listed (seriously, how she manages to leave the house in the morning is a mystery) beauty buffs were over the moon to see the familiar, no-nonsense The Ordinary brand get a mention.

Turns out Mrs West has been slathering her famous face in the low-cost serum, which contains retinol, long championed by dermatologists’ as the secret weapon against the signs of ageing.

You can add it to your own beauty stash here.