Camilla will be making her first trip to Papua New Guinea, Australia and New Zealand, in a private or public capacity, when the royal couple's Jubilee tour begins on Saturday.
Charles, a seasoned traveller, has visited the southern hemisphere nations many times.
He represented the Queen at Papua New Guinea's independence ceremony on September 16, 1975.
In a message to the country's Prime Minister Peter O'Neill and the Governor General, Sir Michael Ogio, sent last month, he said:
"We are both greatly looking forward to experiencing the wonderful, culture and hospitality of Papua New Guinea, which I remember so well from my previous visits all those years ago."
More top news
Feeling colder with a biting, bitter windchill
The Chinese artist wrapped 14,000 bright orange vests around the pillars of the city's concert hall to highlight the plight of refugees.
Petition calling for vote of 'no confidence in Hunt' signed 200,000 times after announcement of junior doctors contracts being imposed.