RTÉ's Washington Correspondent Caitríona Perry found herself involved in the first official phone call between US President Donald Trump and new Taoiseach Leo Varadkar in the Oval Office on Tuesday.

Caitríona was in the White House to report on the President’s phone call to congratulate Mr Varadkar on his new position, when the US leader beckoned her over and asked her to say hello to the Irish leader.

"We have a lot of your Irish press watching us right now," President Trump told Mr Varadkar, before turning to Caitríona and saying, "We have all of this Irish beautiful Irish press here. Where are you from? Come here, come here . . . 

"She has a nice smile on her face so I bet she treats you well," the President told the Taoiseach on the phone in a packed Oval Office as Caitríona, who was shooting the scene on her phone, made her exit.

"He thanks you for the newspapers, Caitríona," President Trump added.

"We have all of this Irish beautiful Irish press here." Picture: Twitter/@markknoller

"One minute we were outside the window and the next minute I'm meeting the President of the United States," Caitríona told RTÉ Entertainment after her encounter with the US Commander in Chief.

"Usually we would shoot from outside the window of the White House and that's what we were expecting today but instead we were invited inside to witness the President's call to the Taoiseach. When we went in he was already on the phone but I caught his eye and he called me over."