British Royals William and Kate will meet with the President this morning.
There'll be road closures in place as the Duke and Duchess also the Guinness Store House.
The trip's expected to cost in the region of a million euro.
Security expert Declan Power has been explaining the point of the visit to us:
"It's not a State visit along the lines of w hen Queen Elizabeth visited
"They'll be keen to emphasise the closeness of the relationship between the two jurisdictions despite the upheavals that Brexit has caused
"That's really what this visit is about, it's trying to restore some of the balance", he told us.
