The royal couple were greeted by their Norwegian counterparts with a kiss on the tarmac as they landed in Gardermoen Air Force Base, just outside snowy Oslo.
The pregnant duchess' blooming bump was on full show in a blue Catherine Walker coat over a £165 dress by maternity label Seraphine.
As pictures show the blooming mother-to-be clutching her stomach, there is no denying her bump has grown considerably in only a matter of weeks.
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William and Kate's private chartered plane landed on the clear runway, but the surrounding area was carpeted in a deep layer of snow that had fallen overnight.
The radiant duchess' hairdresser Amanda Cook Tucker and stylist Natasha Archer were not far behind Kate as they stepped out into the snow with their hands full.
The trip comes 34 years after Prince William’s mother, Princess Diana, completed her first two-day solo visit to Norway to meet King Harald V and Queen Sonja in 1984.
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King Harald V of Norway and his wife Queen Sonja have formally welcomed the Cambridges to their country with a lunch at the royal palace where William and Kate are staying as guests of the sovereign.
After lunch the duke and duchess will visit Princess Ingrid Alexandra Sculpture Park within the palace gardens, which opened last year and is named after the daughter of the Crown Prince and Princess.
The couple were pictured as they left the Royal Palace alongside Crown Princess Mette-Marit of Norway, Crown Prince Haakon, Queen Sonja of Norway and Princess Ingrid Alexandra of Norway.
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The four sculptures were designed by and for children through a nationwide schools' competition, and William are Kate are expected to meet members of the public gathered in the park.
Later, William will meet Norway's entrepreneurs of tomorrow at an event in the capital.
He will celebrate the next generation of businessmen and women based at MESH, a co-working space in Oslo.
Four innovative Norwegian start-ups will be highlighted during his visit - reMarkable, Play Magnus, No Isolation and Motitech - which all work towards tackling issues such as the environment and mental health and well-being in new and engaging ways.
Kate Middleton and Prince William's royal tour of Sweden and Norway
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The duke will also meet Magnus Carlsen, Norway's chess world champion and Grandmaster, and take part in an interactive game of Kahoot!.
In the evening, the Cambridges will be guests of honour at a dinner at the royal palace hosted by the King and Queen and attended by members of the government, business leaders and the Norwegian creative industries.
The final day of the tour will begin at the Hartvig Nissen School, which was the location for the hugely successful Norwegian television programme 'Skam'.Later that morning, the couple will travel to Skaugum, the official residence of The Crown Prince and Princess of Norway, for a private lunch.
The final engagements of the tour will take place in the beautiful setting of Holmenkollen, the snowy hills that overlook the city of Oslo.
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Here, the couple will get a chance to see how Norwegians embrace the outdoors in the coldest of temperatures, and champion the importance of exercise and wellbeing.
The Duke and Duchess will firstly visit Holmenkollen's most iconic landmark – the Holmenkollen Ski Jump, where they will attend an event organised by the Norwegian Ski Federation.
They will enjoy watching a group of local nursery children taking part in an afternoon ski school session on the slopes.
The duke and duchess enjoyed a busy two days in Sweden, where they spent time with the Swedish royal family, including Princess Victoria and Prince Daniel.
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Last night, they enjoyed an evening at the Fotografiska Gallery where they met figures from the movie world, the arts, sport, and television at the gallery in Stockholm.
The pregnant duchess stunned in a floral velvet blue gown by Erdem for the second night running.
During the evening, the Duke of Cambridge delivered a speech pledging to reinforce ties between Britain and Sweden as he praised the “magic ingredients” of life in the Scandinavian country.
