The Taoiseach, Mr Ahern, will hold a private meeting tomorrow with former US president Mr Bill Clinton, a Government spokesman said last night.
While details for the engagement are not yet finalised, the spokesman said there would "definitely" be a meeting.
Mr Clinton is promoting his autobiography, My Life, and will be accompanied in Dublin tomorrow morning by his wife, Senator Hillary Clinton, for a book-signing in Easons of O'Connell Street.
They are expected to meet Mr Ahern after that event. Mr Clinton's publishers, Random House, had hoped that Mr Ahern would attend the book-signing but Mr Clinton wanted to meet Mr Ahern in private.
Mr Ahern is currently winding down his summer holiday in Co Kerry in advance of a meeting on Friday of an ad hoc group set up to consider plans to restructure Fianna Fáil.
While there has been much speculation about next month's Cabinet reshuffle, he is not expected to reveal his plans until the Dáil reconvenes on September 29th.
The Clintons are due to go to the North on Thursday. Mr Clinton has a book-signing engagement in Belfast and Senator Clinton will deliver an address on peace and reconciliation at the University of Ulster in Derry.