The 2014 Giro D'Italia will begin in Belfast and take in the routes through Armagh, before concluding in Dublin.
The deal to bring the race to Ireland could be worth up to £10 million to the Irish economy, exceeding the estimated £4 million bill to put the race on.
The 104th installment of the grand tour will kick off on May 10th and run to the 12th.
Tourism officials and Government representatives are now due to attend launches today at the Titanic Belfast and Dublin Civic offices on Wood Quay.
The last time Ireland welcomed a race of this stature was in 1998 when the opening leg of the Tour De France took place in the country.
The Tour de France will begin in Yorkshire on June 29th, hopefully signalling another bumper year for professional cycling in the UK.