If you tend to save your up-do days for when your hair gets greasy, then you will be pleased to hear Doyle’s advice: “Slick buns work best on hair that’s been last washed a couple of days ago.” He adds that brushing the hair will help to redistribute the oils to the dry mid-lengths and ends. And there are many products designed to deliver Sofia-worthy results.

But even with dry styling, Smith recognises that the main issue “is all about how gently you pull hair back into the bun”, adding that “any style that creates tension is always slightly risky but it’s no different or worse than creating a slick ponytail”. He notes that wet styling can be carried out here – but with caution.

“Wet hair should always be handled with care,” says Smith. He recommends using a wide-toothed comb or a brush that is designed for wet hair, as these tend to have thinner, more flexible bristles. “Never brush from roots all the way to the ends. Instead, start at the bottom, working your way up to ease out any tangles,” he adds.

So is there a correct way to carry this technique out on wet hair? Smith describes how you should “dry hair off slightly with a towel before applying the conditioning treatment – it will help it to absorb better”. But as Doyle says, the conditioning treatment in question is important and if you are going to try the wet hair trick, he recommends opting for a leave-in conditioner instead of a mask, as these are designed to stay in the hair.

Smith adds: “You want to go easy with how much product you apply if you’re planning on leaving it in. Less is more, so I’d suggest using the treatment lightly – more like a serum than a full-on application.”

In conclusion, go for it, but handle your wet hair with caution and use the appropriate products.“Providing you’re gentle and don’t create too much tension and you’re not doing it all the time, this little hair trick is a winner,” explains Smith. “It’s going to give you a bang up-to-date style and also leave you with beautifully soft hair when you take it out.”

Sofia Richie’s sleek bun technique has the hair experts divided. Let’s settle the debate