Pippa Hackett and Roderic O'Gorman have been campaigning over the last fortnight.
Roderic O'Gorman is the favourite to be the next Green Party leader - with the result to be announced this morning.
He's competing with Offaly Senator Pippa Hackett to replace Eamon Ryan and lead the party into the election.
Roderic O'Gorman is seen as the more senior candidate having had charge of a full Department and leading it through various crises when it comes to immigration, mother and baby homes and more.
Though some in the party question how well he's handled that and Offaly based Pippa Hackett's pitch is to make the party more appealing to rural Ireland - after three male leaders from Dublin.
Last time just 50 votes separated Eamon Ryan and Catherine Martin and the nature of the electronic votes means this could go any direction despite O'Gorman being seen as the favourite.