Liz Truss has been appointed the new UK Prime Minister after being officially asked to form a Government by Queen Elizabeth.
Ms Truss met the British Queen at Balmoral in Scotland this afternoon.
The former UK foreign secretary won the race to replace Boris Johnson as Conservative Party leader yesterday – comfortable beating off the challenge of former Chancellor Rishi Sunak.
She is expected to announce her Cabinet at around 4:30pm this afternoon.
The Taoiseach Micheal Martin congratulated her on her appointment this afternoon.
He said Ms Truss had shown a capacity to adapt when it comes to dealing with the EU – noting that he is looking forward to discussing the Northern Ireland Protocol with her very soon.
Micheál Martin said he is willing to work with Ms Truss so long as the interests of the people are to the forefront of discussions.
“If you look at the journey since Brexit there has been sort of volatility in terms of what gets said and what gets done,” he said.
“I think we have to just hold the head and hold the nerve and keep the interests of the people first and foremost.
“That is the approach I am going to take, and I'm vey clear the issues can be resolved.”
It comes after her predecessor Boris Johnson gave his last speech as Prime Minister outside Downing Street.
He said he would "get behind Liz Truss every step of the way" and told the Conservative Party that "it is time to get behind" his successor.