Leo Varadkar is at Downing Street for his first foreign trip as Taoiseach. He's meeting the British prime minister Theresa May to discuss Ireland's concerns around Brexit.
The two leaders are also due to discuss the ongoing talks to try and restore power sharing in the North.
Theresa May says she's determined to keep the UK's border with Ireland the same after Brexit.
Today is the new Taoiseach's first time inside No 10 Downing Street, and he was pretty excited about it. He told gathered reporters that there was "a little thrill in it".
"We spoke on the way in and I was reminded of that famous scene in Love Actually where Hugh Grant does his dance down the stairs, but apparently it wasn't filmed here", he said.
The Taoiseach sounded a bit disappointed when he said "So I didn't get a chance to see the stairs".