The position of Taoiseach will be rotated today for the first time in Irish political history.
Leo Varadkar will be named Taoiseach for the second time following a vote of the Dáil.
It's a day of two Taoisigh.
Micheál Martin wakes up this morning in the top job, but will travel to meet President Michael D Higgins and resign this morning.
The Dáil will then elect Leo Varadkar - the first time Fianna Fáil TDs will have to stand up and vote for a Fine Gael Taoiseach.
It's a moment unprecedented in Irish politics, and one Micheál Martin says was born out of pragmatism.
Old rivalries were largely put aside for the past two and a half years, but the time to come will test the strength of the coalition.
After Varadkar is elected he'll meet the President before setting about remaking his Cabinet.
Few changes are expected - with all eyes on what Department Micheál Martin wants.
It's expected he'll become the Foreign Affairs Minister, with Simon Coveney to move to enterprise.
While Paschal Donohoe and Michael McGrath will swap the Finance and Public Expenditure briefs.
Few further changes are expected among Ministers - but reshuffles always manage to provide a surprise or two.
