Fianna Fáil's Mr Royston Brady will tonight be elected Lord Mayor of Dublin with the help of the votes of Labour members of Dublin City Council.
Fianna Fáil and Labour have shared the post since the last local elections in 1999 under a pact agreed shortly afterwards.
Mr Brady won the Fianna Fáil nomination over former TD, Ms Mary Mooney by 11 votes to 9.
Mr Brady is a brother of Senator Cyprian Brady, a confidante of the Taoiseach, Mr Ahern. Aged 30, the prospective lord mayor has been a training adviser with the tourism training body CERT since December 1999.
He was first elected to the council in the North Inner City Ward in 1999 and was deputy mayor in 2000. He will succeed Mr Dermot Lacey as lord mayor.
And in Cork tonight, Cllr Colm Burke will be elected Lord Mayor at City Hall, becoming the city's 66th Lord Mayor.