The Duke and Duchess of Rothesay will attend the memorial service in honour of the 16 men who died in the North Sea helicopter crash.
The Royal couple will join hundreds of people on Wednesday 15 April in the Kirk of St Nicholas in Aberdeen.
All 16 men on board the Super Puma died when it crashed off the Aberdeenshire coast last week.
A minute's silence is to be held before Aberdeen's SPL match on Saturday at Pittodrie against Inverness.
Half of those killed came from the north east of Scotland, others from across the UK, and one from Latvia.
All the bodies were recovered and have been formally identified.
The Bond Super Puma had been returning from BP's Miller oil platform when it crashed last Wednesday.