Taoiseach Micheál Martin is officiating at the National Famine Commemoration in Strokestown in County Roscommon today.
He will be accompanied by Minister of State with responsibility for Sport and the Gaeltacht and Government Chief Whip, Jack Chambers.
Today's formal State ceremony will include military honours and a wreath laying ceremony by Ambassadors to Ireland in remembrance of all those who suffered or perished during the Famine.
This will be the second time that the commemoration has been held in Strokestown Park, in Strokestown, County Roscommon, having been previously held there in 2014.
Wreaths will also be laid by His Excellency, Archbishop Jude Thaddeus Okolo, Dean of the Diplomatic Corps, Councillor Joe Murphy Cathaoirleach of Roscommon County Council, Jim Callery the founder of The National Famine Museum and Clare McGrath, Chair of the Irish Heritage Trust.
Singer-songwriter Declan O'Rourke will perform songs from his work, Chronicles of The Great Irish Famine.
The ceremony will be broadcast on the RTÉ News channel from midday as it will not be open to the public.