The Ski World Championships are back in Trondheim and the Trøndelag region, last time was in 1997. The world championship will be held from 26 February to 9 March 2025
King Harald has already confirmed to NRK that he and the Queen is going. Cp Haakon is a member of the advisorary main comitee so I guess he will also be there and since it overlaps with the wintervaction Ingrid and Sverre will probably come as well, it says the royal family have confirmed their attendance here, anything else would be a major supprise.
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We also know the finnish president and first lady are invited personally by the King to see their best medal chance on March 4th (mens 10 km classic) and it would also be very supprising if not the Swedish royals also came for some days.
King Harald has already confirmed to NRK that he and the Queen is going. Cp Haakon is a member of the advisorary main comitee so I guess he will also be there and since it overlaps with the wintervaction Ingrid and Sverre will probably come as well, it says the royal family have confirmed their attendance here, anything else would be a major supprise.

Kronprinsen klar for VM - Ski-VM Trondheim 2025
Kronprins Haakon var nylig i Trondheim i forbindelse med hovedkomitemøtet til Ski-VM 2025. Før møtet fikk han ei flott VM-jakke, som han straks tok på seg og smilte fornøyd sammen…

We also know the finnish president and first lady are invited personally by the King to see their best medal chance on March 4th (mens 10 km classic) and it would also be very supprising if not the Swedish royals also came for some days.