Maureen Haughey, who was married to the late former taoiseach Charles Haughey, is to attend a Fianna Fáil event later this week to launch the party’s 1916 centenary commemorations.
Party sources have said Mrs Haughey, a daughter of Seán Lemass, has confirmed her attendance for the event on Friday.
Fianna Fáil leader Micheál Martin and Galway West TD Éamon Ó Cuív are due to outline a series of public commemorations to be held by the party in the run-up to the centenary. The event will take pace in the Royal College of Surgeons, which was used as a garrison for members of the Irish Citizen Army during Easter Week.
Earlier this year the party established the Coiste 1916 committee to oversee the commemorations.
The party has invited a number of relatives of those who fought in 1916 to attend the event. Mrs Haughey was invited because of her father’s part in the Rising.