Watch Michael D Higgins's speech live Live blog as it happens
Analysis from our political team Domestic and international reaction
Key Times
11.25amThe President-elect and his wife Sabina depart Farmleigh for Dublin Castle accompanied by Army motorcycle escort.
11.43amThe President-elect arrives at the State Apartments and is escorted to the Connolly Room .
11.55Taoiseach Enda Kenny, the Government, the outgoing Council of State and officiants proceed to St. Patrick's Hall.
11.57The President-elect accompanied by Tánaiste Eamon Gilmore and Minister for Education Ruairí Quinn proceeds to St Patrick's Hall.
NoonInter-faith ceremony begins including Christian, Jewish,
Muslim blessings and a Humanist reflection.
12.25pmInauguration ceremony begins with the presidential declaration of office.
12.35 (approx)A fanfare and 21-gun salute indicate that President Higgins has entered office. This will be followed by his inauguration speech and the national anthem.
12.55President Higgins will inspect the guard of honour.
1.20pmPresident and wife Sabina will be driven to Áras an Uachtaráin
6.15Guests begin to arrive for the State Reception at Dublin Castle.
6.50President and Sabina will arrive at Dublin Castle where they will be greeted by Taoiseach Enda Kenny.
7pmState reception begins.