Micheál Martin has been elected as the new taoiseach (Irish prime minister) at a special meeting of the Irish parliament in Dublin.
The 59-year-old Cork native has been the leader of the Fianna Fáil party since 2011.
He will lead a three-party coalition consisting of Fianna Fáil, Fine Gael and the Green Party.
It is the first time in history that former Civil War rivals Fianna Fáil and Fine Gael have governed together.
Mr Martin is expected to lead the country until December 2021 before handing back over to Leo Varadkar, the Fine Gael leader.
