The new Minister for European Affairs, Paschal Donohoe, said he is shocked and privileged to be appointed.
Paschal Donohoe replaces Lucinda Creighton, who resigned last night after voting against the government on the abortion legislation.
The new junior Minister says he was on his way home from the late night vote when he was asked to turn around.
"I was on my way home … and I was driving up Gardiner Street and I got a phone call asking that I come back in to the Taoiseach's office," he explained.
"So I came back in in the early hours of this morning, I had a short meeting with [the Taoiseach] and then [my appointment] was ratified by the cabinet in the early hours of this morning."
He also said Ireland needs to act very carefully if the UK decides to leave the European Union.
Donohoe said a British exit would leave Ireland with big decisions about its relationship with the UK and the border with the North.