Here is how President Barack Obama will spend his 24 hours in Ireland.
9:35am: The President and First Lady Michelle Obama touch down at Dublin Airport on Air Force One to be greeted by Tánaiste Eamon Gilmore.
10:15am: Their first engagement will be with President Mary McAleese, who will greet them at her residence in the Phoenix Park, Áras an Uachtaráin, before they hold a private meeting and sign the guest book and attend a tree-planting ceremony.
11:15am: The President holds a bilateral meeting with Taoiseach Enda Kenny and the Tánaiste in the state residence Farmleigh, in the Phoenix. Aides say the talks will include “all matters of a national interest”.
1:20pm: President Obama is due to travel to the US Embassy in Ballsbridge for a private meet and greet with the Washington diplomatic corps.
3:15pm: The President and First Lady visit his ancestral homeland in the village of Moneygall, Co Offaly in the Midlands where 2,000 lucky "golden ticket" winners will get to share the homecoming celebrations.
5:30pm: President Obama follows in the footsteps of other leading Irish-American presidents when he delivers a speech to a crowd of thousands on College Green in Dublin city centre.
The President will stay overnight in Dublin before departing from Dublin Airport on Air Force One tomorrow morning for his State visit to the UK.