In the picture, she can be seen wearing an elegant silk wedding dress and diamond tiara with a lace veil trailing behind her whilst the prince wears his military uniform.

Alongside the intimate picture, a caption reads: “Today it is 20 years since the Crown Prince and Crown Princess got married in Oslo Cathedral.

“Congratulations on the day, Crown Prince Haakon and Crown Princess Mette-Marit.”

Hundreds of well-wishers commented on the post to pass on their congratulations.”

One wrote: “Congratulations to the world’s most beautiful crown prince couple.”

Another commented: “Wow you look so beautiful and charming” whilst a third posted: “Congratulations to good role models.”

Many others commented with heart emojis and wishing the couple happiness.

The Princess is one of the more colourful members of royalty.

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Since marrying the Prince, Princess Mette-Marit set up The Crown Prince and Crown Princess’s Foundation with her husband which helps young people gain leadership skills.