Princess Märtha Louise, 52, and Mr Verrett, who will not become a prince following the wedding, announced their engagement in 2022. While their relationship has divided Norway, King Harald has previously told Norwegian reporters that Mr Verrett was “a great guy” and that the two of them “laughed a lot, even in this difficult time”.

In 2022, the Norwegian palace announced Märtha Louise would “relinquish her patronage role” as she and Mr Verrett sought to “distinguish more clearly between their activities and the Royal House of Norway” and to “prevent misunderstandings regarding the Royal House”.

Since then, the pair have been criticised by the palace and members of Norway’s parliament for linking commercial activities to the princess’s royal status.

Kristi Marie Skrede, royal correspondent for Norway’s NRK TV, said their relationship it has caused a conflict within the royal family, as well as public controversy.

“Many Norwegians are disturbed that she uses her royal connections to earn money,” said Ms Skrede, adding that some believe it is a sign of “disrespect” to King Harald.