Taoiseach Leo Varadkar has said any border that exists between the Republic and Northern Ireland after Brexit must be invisible.
He was speaking after meeting British Prime Minister Theresa May in his first official overseas visit since being elected Taoiseach last week.
He said he was very reassured by his meeting with Mrs May at Downing Street today.
Mr Varadkar added that both Irish and British governments need to be impartial actors in relation to power-sharing in Northern Ireland.
He said any confidence and supply deal between the Conservatives and the DUP would not jeopardise efforts to restore the executive.
Taoiseach Leo Varadkar compares walking into Downing Street for the first time with a scene from Love Actually. pic.twitter.com/twANjsbBTm— RTÉ News (@rtenews) June 19, 2017
Mrs May said she is committed to finding a practical solution for the land border in the North after Brexit and said she wanted it to be as seamless as possible.
She added that her government does not want to damage trade between Ireland and Britain.
In a statement, she also said that it is her "firm belief" that a resolution can be reached to restore power-sharing at Stormont.
Earlier, she said she was steadfastly committed to the Good Friday Agreement and wanted to see a "close and special partnership" with the Republic of Ireland post-Brexit.