Edward Crawford, the new US Ambassador to Ireland, has been sworn into office by the US Vice President Mike Pence.
Mr Pence tweeted that it was his honour to swear Mr Crawford into office on behalf of US President Donald Trump.
He added that the friendship and alliance between the US and Ireland had been a cornerstone of peace, prosperity and freedom across the Atlantic.
The ceremony was attended by the Irish Ambassador to the US Dan Mulhall, who tweeted that he wished Mr Crawford every success.
Ambassador Mulhall also said that Mr Pence referenced the strong economic ties between Ireland and America and spoke about his own Irish heritage.
The friendship & alliance between the US & Ireland has been a cornerstone of peace, prosperity & freedom across the Atlantic. On behalf of President @realDonaldTrump, it was my honor to swear in the next US Ambassador to the Republic of Ireland Edward Crawford today! pic.twitter.com/k4Wr2VtXGG— Vice President Mike Pence (@VP) June 26, 2019
Earlier this month, the US Senate confirmed the appointment of Mr Crawford with 90 votes in favour of his nomination and 4 votes against.
Now that he has been sworn into office, Mr Crawford will travel to Ireland to present his credentials to President Michael D Higgins and will then formally take up the post of US Ambassador.
Mr Crawford appeared before the US Senate Foreign Relations Committee in April and said he was grateful to President Donald Trump for his nomination.
The Ohio businessman added that if he is confirmed, he would bring a firm commitment to the Northern Ireland peace process.
Just attended swearing-in by Vice-President Pence of the new US Ambassador to Ireland, Edward Crawford, to wish him every success with his assignment in Ireland. The VP referenced the strong economic ties between Ireland & US & his own Irish heritage. @USEmbassyDublin @dfatirl. pic.twitter.com/MYf1ZYSaI0— Daniel Mulhall (@DanMulhall) June 26, 2019
There has not been a US Ambassador to Ireland since January 2017.
Kevin O'Malley was the last holder of the position but his term ended when former US president Barack Obama left office.