Ivanka Trump congratulated British lawmaker Boris Johnson on his  appointment as prime minister of the United Kingdom ― with a Twitter typo.

The daughter of the US president ― who himself is well known for spelling mistakes on his favorite social media platform ― wrote “United Kingston” instead of United Kingdom.

It follows President Donald Trump’s similarly embarrassing gaffe last month, when he called Prince Charles the “Prince of Whales” instead of the Prince of Wales following a state visit to the U.K.

Ivanka Trump later deleted her misspelled tweet and replaced it with the name of the country spelled correctly. But not before her error was immortalized online.

For this, she was trolled by many netizens who accused her of creating another kingdom not found on the world map.

Meanwhile Boris Johnson has taken charge as British prime minister after an emotional Theresa May bowed out.

The new PM vowed to keep his ‘do or die’ Brexit pledge in a bullish speech in Downing Street today after the Queen installed him as PM.

Watched by girlfriend Carrie Symonds outside No10, the new premier said he was honoured to have been chosen to take over from Theresa May.

As the street was bathed in sunshine, Mr Johnson said he would ‘honour’ the mandate of the 2016 referendum and prove the ‘doomsters and the gloomsters wrong’.

‘The British people have had enough of waiting. The time has come to act,’ he said.

‘Never mind the backstop, the buck stops here.’

He wished for the ‘warmest possible’ relations with the EU, but would prepare for the ‘remote’ possibility the bloc refuses to offer an acceptable deal.

Mr Johnson also insisted that his plans would stretch far further than Brexit, and he would boost police numbers by 20,000, bring forward a new social care system and boost education.

Meanwhile, a brutal Cabinet reshuffle is taking shape – with Defence Secretary Penny Mordaunt, a Jeremy Hunt supporter, revealing she was going to the backbenches after being sacked.

Trade Secretary Liam Fox has also been axed from the government. Business secretary Greg Clark was fired, sharing the fate of a host of Remainers including Chancellor Philip Hammond and International Development Secretary Rory Stewart who fell on their swords before Mrs May left.

Mr Johnson achieved his lifetime ambition of becoming PM minutes earlier, having arrived at Buckingham Palace just after 3pm despite environmental protesters briefly trying to block his car.

He was greeted by the Queen’s aides and taken into the building for his crucial audience – with pictures showing the moment they shook hands.