The Duchess of Cornwall, better known to many as Camilla Parker Bowles, will pay her second visit to the Cunard ship Queen Victoria this weekend.
She christened the vessel in December 2007 and will visit again when the liner calls at Liverpool for the first time on July 26th.
The duchess's appearance will be part of Cunard's celebration of the 170th anniversary of its first ship setting sail from Liverpool in July 1840.
Peter Shanks, president and managing director of the cruise line, will welcome the special guest and escort her aboard the ship for a tour and a meeting with crew members.
Mr Shanks said: "Cunard is honoured that Her Royal Highness named this fine ship and delighted that she continues to display such an interest both in the ship and in the crew.
"The duchess will always be warmly welcome on board."
Cunard's newest ship, Queen Elizabeth, is set to enter service in October this year.