Organisers of the main state event to mark the centenary of the 1916 rising expect thousands to throng the streets this morning in the capital.
A parade will begin at St Stephen's green later.
The President and Taoiseach will take part in a commemoration ceremony outside the GPO.
The main event of the commemoration weekend takes place this afternoon, with a parade and ceremony outside the GPO.
Thousands of military personnel as well as members of the emergency services will march in the parade.
It will start at St Stephens' Green before making its way through the city and finishing outside the GPO - the rebels base of operations during the Rising.
There the proclamation will be read by an army officer and the president will lay a wreath to remember those who died in the fighting.
Some 1,350 people were killed or injured during the six day insurrection.
John Concannon, director of the 1916 commemorations, has said it is a huge weekend for the country.
There will be heavy traffic restrictions in Dublin City today - and the Luas won't be running due to strike action.
Lauren Beehan with AA Roadwatch has this advice: “Commuters should bear in mind that a large number of routes are closed, in Dublin city centre at the moment.
“Those coming in for the parade are advised to plan their route well in advance.
“Major diversions are in place from the Grand Canal on the south side and from Dorset street upper on the north side.
“So allow plenty of extra time for any journey crossing the city today and bear in mind bus routes will also be diverted.
“O’Connell St is closed for the whole weekend and there are restrictions to local access as well.”
The parade begins at 10am, with the commemoration at the GPO due to start at 12.30pm.
Coverage of the Easter commemorations on RTE can be watched here.