St Patrick's Day festivities are underway across the country.
Hundreds of parades are being held this afternoon to mark the feast day of our patron saint.
Tourism Ireland says it's impossible to put a price on the publicity that Ireland receives around the world on St Patrick's Day.
Iconic landmarks in Australia and New Zealand have already switched on their green lights as darkness falls in the Southern Hemisphere.
It's all part of Global Greening organised by Tourism Ireland.
Half a million people, including more than 100 thousand overseas visitors, are in the capital today.
A larger than normal garda presence is also visible to clamp down on anti social behaviour and to help deal with the massive crowds.
