Former US president Bill Clinton will visit Northern Ireland to mark the 10th anniversary of the Good Friday Agreement.
Mr Clinton will be joined by Senator George Mitchell, who played a crucial role in brokering the 1998 accord, at a special event in Belfast in April.
Northern Ireland First Minister Ian Paisley has not yet indicated whether he will attend the US-Ireland Alliance commemoration, which will be held at Queen's University.
However, Deputy First Minister Martin McGuinness of Sinn Féin will be attending.
Trina Vargo, president of the US-Ireland Alliance, welcomed the confirmation of the former president's visit, saying 'President Clinton's involvement was crucial in bringing peace to Northern Ireland.
'I am sure that President Clinton's presence will inspire the young leaders participating in this event to make their own contributions to the process and to the relationship between the US and the island of Ireland.'
Other confirmed guests include General John de Chastelain, who oversaw paramilitary decommissioning, former and present SDLP leaders John Hume and Mark Durkan, Ulster Unionist leader Sir Reg Empey and ex-Northern Ireland secretary Paul Murphy.
The US government is helping to sponsor the event.
In conjunction with the Belfast plans, there will be a dinner in Dublin, which will raise money for suicide prevention.
Mr Clinton is currently campaigning for his wife Hillary Clinton in her bid for the US Democratic presidential nomination.