Former EU Commissioner Mairead McGuinness will be Fine Gael's candidate for the presidential election.
Her name was the only one put forward when nominations closed on Tuesday afternoon. Fine Gael will ratify her candidacy in September.
Meanwhile, Independent TD Catherine Connolly is expected to launch her campaign for the presidency on Wednesday.
It is understood that the Galway West TD will speak to Raidió Na Gaeltachta.
Ms Connolly is expected to easily surpass the 20 nominations threshold of support from Oireachtas members which is required.
She has the backing of 12 Social Democrats, including Eoin Hayes, as well as the two People Before Profit TDs.
Independent TDs Charles Ward, Seamus Healy and Brian Stanley have also confirmed they will nominate her.
Senator Eileen Flynn will also support the Galway West TD saying that Ms Connolly stood for human rights and equality and would represent Ireland to the very best.
The Labour Party said it held a "constructive and respectful meeting" with Ms Connolly.
In a statement, a party spokesperson said: "A consultative survey will issue to membership tomorrow. This consultation will conclude in two weeks' time.
The statement added that the party’s "executive board and parliamentary party will meet on 31 July to discuss and agree an approach to the presidency".
Green Party leader Roderic O'Gorman said his party is open to a conversation with Ms Connolly about whether her vision aligns with Green Party values. But he said no decision had been made yet as to who the party might back in the presidential election.
In a statement this evening, the Green Party said they are "still undertaking their own internal process regarding supporting any potential candidate".
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Meanwhile, it is understood that businessman Declan Ganley has been actively canvassing various independent TDs and Senators looking for their backing.
Two-time former presidential candidate and businessman, Sean Gallagher, has confirmed he will not contest this year's election.
Mr Gallagher came in second place in the 2011 campaign, losing out to Michael D Higgins.
He ran again in 2018 when he got 6.4% of the vote.
Aontú leader Peadar Tóibín is seeking to put together a voting bloc of Oireachtas members with the aim of building consensus around a potential presidential candidate who reflects their values.
He said there was a danger that a contest solely between Ms Connolly and Ms McGuinness would mean that a section of the population did not have their values reflected in the debate.
Mr Tóibín said Ms Connolly was a good candidate, but that his party believed further candidates are needed to add more dimensions to the debate.
He has suggested two candidates in particular although he would not name them.
Asked whether Independent Ireland MEP Ciaran Mulloolly was one of those people, Mr Tóibín said that while he had spoken to the MEP, he was not suggesting him as a candidate.
Fianna Fáil is still considering its options.
Minister for Public Expenditure Jack Chambers said that a final decision was months away.
"We'll make a decision on whether we'll have a candidate or not in the early autumn. That's a matter for our parliamentary party to discuss at that point," he said on RTÉ Radio One's News at One.
Taoiseach and Fianna Fáil leader Micheál Martin’s name has been floated as a potential candidate, but Mr Chambers said that he felt Mr Martin would prefer to stay in his current role.
