Suffice to say, Julia Roberts has great skin. And although an eternally glow-y complexion might be down to good genes and an A-list lifestyle, who wouldn't still want in on the actress's skin secrets?

Roberts has often kept her go-to skincare under lock and key, revealing only the virtues of taking off your make-up at night and favouring simplicity over excess, but her daily moisturiser, on the other hand, might actually be sitting in your bathroom cabinet: the OG Weleda Skin Food.

A cult sensation, whose legion of fans includes Rosie Huntington-Whitley and Victoria Beckham, it's now so popular that one sells every 11 seconds. Yes, really.

'I put it on my hands after I wash the dishes, and wind up putting it on my elbows and feet, before you know it, I've squeezed this poor little green tube into a twist,' Roberts told Instyle in a previous interview.

So, what's all the fuss about, then? It starts with hero ingredient Viola Tricolor. 'The quiet and unassuming wild pansy, or Viola Tricolor, has a long history of use in traditional herbalism, being used to treat many complaints including skin diseases and eczema,' explains Emine Rushton, holistic expert and author of 'Natural Wellness Every Day: The Weleda Way'.

'This plant grows easily in all gardens and can be used to effectively calm down dry, irritated skin – the active pharmaceuticals having a cleansing action on the skin and a stimulating action on the circulatory and immune systems,' she continues.

The ultimate hydration hero, this moisturiser does a lot in a little: it helps boost hydration levels, thanks to ingredients like glycerin; locks in moisture and supports skin barrier function. (Remember: a compromised skin barrier can inflict skin hell on your complexion, exposing your your skin to pollution, UV rays and blue light; some of the main contributors to premature ageing).

So if your skin is feeling desert dry (thank you, heatwave), now might be the time to turn your attention to this super rich, super budget-friendly skincare hero– your face, elbows, hands and feet will thank you.

You Might Also Like

• 13 Buys To Help You Feel Great From £5

• 16 Speedo Swimsuits that Won't Flash Your Bum When Getting Swim-fit

• 11 Best Gym Trainers for Different Types of Workouts