Last year her husband Prince William reportedly joked that the Duchess of Cambridge has hair that is a “nightmare” to style and now her hairdresser Amanda Cook Tucker has revealed all the tools she uses to create those luscious curls in a social media post.

The royal couple – who have been joined by Ms Cook Tucker – will begin the tour in Sweden on Tuesday, then spend time in Vasaparken, Stockholm tomorrow, before heading to Oslo for two days.

The expansive haul of hair products includes no less than 13 brushes, six combs and two hairdryers.

Kate, who is around six months' pregnant with her third child, will have to be perfectly groomed for a number of events, including meeting the Swedish and Norwegian royal families and a black-tie dinner at the residence of the British ambassador in Sweden.

Celebrity hairdresser Jason Collier said: “I’m not surprised Kate’s hairdresser has such a substantial kit for the Royal Tour – we’ve come to expect Kate to look impeccably groomed and glamorous, and she is so famous for that beautiful blow-dry that it always needs to look perfect.

“In terms of the kit, there’s everything a stylist could need to create hair worthy of a princess.

“Round barrel brushes are essential for creating Kate’s infamous bouncy blow-dry. The first brush looks to be a metal bristle brush, which is great for heat-styling wet hair – the first step in the blow-dry process.

“A natural boar bristle barrel brush is in there too, along with a large mixed-bristle brush; the natural bristles grip the hair really well, while the mixed version would pull through hair nicely to create lots of lift and volume.

“The next set of brushes look to be ceramic bristle brushes, which are again fantastic for creating plenty of gloss and shine.

“The larger brush would be used to create smoothness and large waves, while the smaller brushes would be used for Kate’s fringe sections, or to create small flicks or curls towards the front of the hair.

“Next up, there’s a teasing brush, which is used to create root volume on dry hair, giving Kate that full, bouncy finish she’s known for. The cushion brush beside it is great for detangling either wet or dry hair, to remove knots without damage.

“And then we have a selection of combs: tail combs for creating sharp partings and neat lines, fine-tooth combs for smoothing and getting that perfect smoothness in up-dos, and a wide-tooth comb to gently work through wet hair.

“And of course, there’s plenty of hairspray to keep those famous curls locked in place, including the classic Elnett – if it’s good enough for the Duchess...

“And finally, the tools required for Kate’s crowning glory hairdo. A wide barrel tong is perfect for creating large curls or soft waves in the hair, while the conical tong is used to shape curls that are looser at the top and more pulled-together at the bottom – a look which Kate wears often to create shape without stiffness.

“The slim barrelled tong is great for smaller curls or creating areas of movement around the face when the hair is worn up, and of course there are straighteners in the mix too.”

Amanda often styles Kate's hair at Kensington Palace and has been cutting William and Harry's hair since they were children.

The stylist has been Kate's hairdresser since the couple visited Asia during a Diamond Jubilee visit, on behalf of the Queen, in September last year.

During the tour, the Duchess of Cambridge’s hair appeared to defy the humidity – which usually leaves hair looking frizzy – as it remained sleek and bouncy.

Mr Collier told Femail: “There’s a water mist bottle there, which is great for reviving a hairstyle that’s in need of a boost.

“After a day’s walking out and about, Kate’s hair might need a little rejuvenation, so a quick mist with water and a blast with the dryer will give a fresh bounciness back to the style in seconds.”

The Duke and Duchess of Cambridge will begin their Scandinavian tour by celebrating the culture and people of Sweden on Tuesday.

Travelling at the request of the Foreign and Commonwealth Office, William and Kate will attend various events including the celebration of Swedish design with Ikea.

The couple, who will move on to Norway on Thursday for a two-day visit, will be joined for much of their Swedish trip by country’s popular Crown Princess Victoria and her husband Prince Daniel.

Kate, who is carrying her third child, is around six months pregnant but is expected to take full part in the trip which features a number of events outside despite the freezing conditions.

Jason Knauf, their Royal Highnesses communications secretary, said: "The Duke and Duchess have asked, as with previous overseas visits, that this tour allows them opportunities to meet as many Swedes and Norwegians as possible.

"Their royal highnesses will meet a wide variety of people, including children and young people, those working in the mental health sector, and leaders in business, academia and scientific research, government, civil society and the creative industries."