Thousands of American Football fans are touching down in Dublin ahead of the first NFL (National Football League) match in Ireland.
Dublin is no stranger to hosting college football games, with seven staged since 2012, but this is the big one.
On Sunday, the Pittsburgh Steelers and Minnesota Vikings will make history when they compete in Croke Park.
Dublin Castle is hosting 'NFL Experience Dublin' which has been billed as a three-day festival of all things American Football.
There will also be a Super Bowl gallery in City Hall, an NFL merchandise pop-up store, pub takeovers, pep rallies and tailgating parties.
The Government has invested €9.95 million, before VAT, in hosting the match.
It has estimated that 30,000 international fans of the sport will travel to Dublin for the event and said that an economic assessment, carried out by Fáilte Ireland for the Department of Tourism, projected that the event "will generate €64m in additional economic activity for Ireland with a direct Exchequer return on the State's investment of nearly two to one".
The regular-season game is also expected to attract a TV audience in the United States in excess of at least 17 million and will be shown in 200 countries worldwide.
Roughly one third of those who pre-registered for tickets were from Ireland, a third from the US and one third from the UK and Europe.
A crowd of around 75,000 is expected in Croke Park for the match, down from the usual 82,300 capacity, in part because seats have been installed on Hill 16 and the Nally Stand.
