US President Donald Trump is in Ireland as part of a two-day visit to the country
He has landed at Shannon Airport, and is on his way to his golf resort in Doonbeg, County Clare, where the Irish Open golf tournament is being held
Asked earlier by reporters about the prospect of a united Ireland, Trump said he doesn't want to "cause any problems" but thinks it would be a "great thing", adding: "I'd love to see it unified"
No 10 has responded to the remarks, while the Democratic Unionist Party says Northern Ireland's constitutional future "won't be decided by commentary in London, Dublin or Washington"
Trump held separate meetings earlier with Taoiseach (Irish Prime Minister) Micheál Martin and Irish President Catherine Connolly
Traffic is at a standstill in parts of Dublin city centre as a protest with more than 10,000 people made its way through the Irish capital
Trump's comments could be more than just a random, off-the-cuff remark ahead of the US midterm elections, writes our correspondent
Caitriona Perry
Presenter, BBC News
Earlier, while President Trump was in Áras an Uachtaráin, the official residence of the Irish President, he signed the visitor book.
I’ve just seen the page.
He wrote “A great honor to be here. Thank you!", and then signed his name.
Image source, RTÉ
Chris Page
BBC News Ireland correspondent
Among the journalists outside Farmleigh House, there was a collective loud gasp when Donald Trump made those comments about a united Ireland.
He said he would be in favour of Irish unification, describing it as a “feather in everyone’s cap”.
He acknowledged the UK would have something to say about it, but said it would be a “fantastic thing”.
We had the issues come up which everyone expected - the Middle East, energy and broader international relations - but no one saw the Irish unification one coming.
It was one of those off-the-cuff moments from Donald Trump and it is certainly going to generate a huge amount of political debate, not least in Northern Ireland.
Ciaran McCauley
BBC News NI
The questions to Trump and Martin have now ended, with his comments ranging from Iran, Gaza and, interestingly, right up to his view that a united Ireland "will happen" even if "the UK has something to say about it".
Those lines are sure to cause a reaction, particularly in Northern Ireland.
Many unionists, who support Northern Ireland continuing to be part of the UK and oppose reunification, have also been supporters of Donald Trump.
Back in March, during a St Patrick's Day visit to Washington, Northern Ireland's deputy first minister Emma-Little Pengelly - from the Democratic Unionist Party (DUP) - said the president was joking when he referenced promoting a possible "merger" in Ireland.
There was no suggestion he was joking a little while ago at Farmleigh House.
Image source, AFP via Getty ImagesTrump is now asked about Irish reunification.
The president says he does not "want to cause any problems" but says he would "love to see it unified".
He says he has friends on both sides and that it would be a "great feather in everybody's cap" if there was unification.
He says it is "going to happen eventually" and adds that he thinks it would be a "great thing".
He says that the "UK will have something to say about it" but "how can it be bad?"
Trump is now asked what he'd say to people protesting today about his visit in Ireland.
"I haven't seen any protests," he says, before joking: "It's a friendly protest."
He says the US has a "great relationship with Ireland".
It's a "very profitable one for Ireland, less profitable for us to be honest with you," he adds.
Trump is now asked about what he would say to those in Ireland who say the US is facilitating genocide in Gaza and the illegal occupation by Israel of territories in West Bank.
"We put out the fire," Trump responds and adds that the US got all of the hostages taken in the 7 October attack returned to Israel.
He adds that the US has "facilitated a peace of a kind".
Martin interjects and says that he has discussed the need for ongoing humanitarian aid going into Gaza with Trump.
"We'll get that done, definitely," adds Trump.
Trump now takes questions from reporters. The first is on when the Iran war will end.
He replies: "I think very soon... probably right after the midterms."
He reiterates his position that "Iran cannot have a nuclear weapon", calling it "very simple".
"Oil [prices] will come tumbling down when that happens," he says.
Donald Trump is now speaking and thanks the Irish taoiseach. He says the pair have been friends "since the beginning" and they have a great relationship.
The pair share a joke as they speak about the Irish Open, which Trump will be attending later today and tomorrow.
Trump says the leaders have had discussions on trade and that the US has a great relationship with Ireland.
"It has never been as good as it is right now," he says as he thanks the taoiseach for hosting him.
We're currently listening into a sit-down conversation between Taoiseach (Irish Prime Minister) Micheál Martin and Donald Trump.
Martin pays tribute to those who lost their lives during 9/11, and remembers the "bravery and sacrifice" of first responders.
He says he's "particularly pleased" Trump has made it to Ireland for the Irish Open golf tournament, referencing a "very strong sporting relationship" between the two countries.
He also praises the "strength of the economic relationship" between the US and Ireland, saying he is "very pleased" to welcome Trump to Ireland.
Taoiseach (Irish Prime Minister) Micheál Martin and President Trump are now speaking inside Farmleigh House.
We'll bring you the key lines and you can follow along by clicking watch live at the top of this page.
Donald Trump is now at Farmleigh House for his meeting with the taoiseach.
Here's a recap of where he has been and where he is going:
Trump is of course in Ireland to take in the golf:
Gabija Gataveckaite
BBC News NI Dublin correspondent
The presidential limousine, nicknamed The Beast, is getting some TLC while Donald Trump speaks with Taoiseach Micheál Martin inside Farmleigh House.
President Trump was greeted outside Farmleigh House by Taoiseach (Irish Prime Minister) Micheál Martin and his wife Mary.
They then went inside to begin their bilateral meeting.
Image source, ReutersWe've just seen Donald Trump arrive at Farmleigh House for his meeting with Taoiseach (Irish Prime Minister) Micheál Martin.
The motorcade pulled up before the president was seen stepping out of the vehicle.
Image source, Reuters
Image source, PA MediaUS President Donald Trump stepped off Air Force One shortly after 08:30 at Dublin Airport before being greeted by Ireland’s deputy premier Simon Harris.
Trump's motorcade then made its way to Áras an Uachtaráin, the official residence of the President of Ireland, in Phoenix Park where he was met by the Irish President Catherine Connolly.
He is now on his way to meet Irish premier Micheál Martin, the Taoiseach, at the Farmleigh Estate, which is also within the park's boundary.
Here's a reminder of what else the president will do in Ireland today:
Image source, Getty ImagesEarlier dozens of members of the honour guard were in position outside Áras an Uachtaráin for his meeting with President Connolly.
Image source, Getty ImagesWe'll bring you more on Trump's comments outside his meeting with the Irish president as soon as we can. In the meantime, the president's motorcade has now left Áras an Uachtaráin for the short journey to Farmleigh House.
He is due to meet Taoiseach (Irish Prime Minister) Micheál Martin for a bilateral meeting.
Catherine Connolly and Donald Trump have now emerged from Áras an Uachtaráin following their meeting.
As the president was making his way to his vehicle, some members of the press shouted questions and he stopped to answer some of them.
When asked about the situation in Iran, he responded: "Everything will work out fine."
Image source, PA MediaTaoiseach (Irish Prime Minister) Micheál Martin has been seen waiting for Donald Trump's arrival at Farmleigh House.
That's also in Phoenix Park, just a short journey from Áras an Uachtaráin where Trump is meeting Irish President Catherine Connolly.
Gabija Gataveckaite
BBC News NI Dublin correspondent
While President Trump meets the Irish president, preparations are well under way at nearby Farmleigh House where he is due to meet Taoiseach Micheál Martin for a bilateral meeting later this morning.
The red carpet was being hoovered at Farmleigh earlier this morning, with a band rehearsing.
There is dozens of media gathered here awaiting the arrival of President Trump.