Prince Harry is due in Plymouth today.
He'll formally open the Royal Navy's new £30m amphibious centre at the Devonport Naval Base on Friday.
Royal Marines Tamar will be a centre of operations for small craft, hovercraft and fast boats and will train marines in coastal and river landings.
The prince will also attend a parade and reception at the centre.
The West Country has today been welcoming the arrival of William and Kate's baby son. The little boy, who has yet to be named, will eventually become the Duke of Cornwall.
And across the region people have been marking the occasion - no more so than a family from Penzance, whose latest addition was also born yesterday.
Jeff Welch has this report:
Both my wife and I are overjoyed at the arrival of my first grandchild. It is an incredibly special moment for William and Catherine and we are so thrilled for them on the birth of their baby boy.
Grandparenthood is a unique moment in anyone’s life, as countless kind people have told me in recent months, so I am enormously proud and happy to be a grandfather for the first time and we are eagerly looking forward to seeing the baby in the near future.
The Duchess of Cornwall will celebrate her 66th birthday with members of the public in Cornwall today.
Camilla and Charles will conclude their three-day tour of Devon and Cornwall in Lostwithiel.
They arrived in the region on Monday and have spent their trip "waiting by the phone" for news of the royal baby.
After the engagement, the royals will head to Lostwithiel Parade Square to meet schoolchildren, members of the local community and the Lostwithiel Town Band.
Camilla is to be presented with a cake to mark her birthday and the band will play Happy Birthday to her.
The phrase "by royal appointment" probably conjures up an image of a coat of arms on a range of products and the prestige that goes with it. Well, suppliers of goods and services to the royal household, including some from our region, were invited to Buckingham Palace to meet the Queen.
Prince Charles and the Duchess of Cornwall will begin an annual tour of Cornwall and Devon on Monday.
They'll visit Bude as well as Lostwithiel on The Duchess's birthday, where the pair will meet members of the community and mark the re-opening of the Duchy Palace.
Prince Charles has unveiled his Coronation Meadows project - his own tribute to the Queen, to mark the 60th anniversary of her coronation.
60 meadows across the UK have been given regal status - there's one in every county of the South West.
Today's launch was in the Prince's home Highgrove House in Gloucestershire.
Prince Charles will unveil coronation meadows across the region today to promote the conservation of grasslands.
Geena Moor in Cornwall, Dunsden Meadows in Devon and Chancellors Farm in Somerset are three of 60 grasslands chosen across the UK to mark the anniversary of the Queen's coronation.