The “United Kingston” trended Tuesday morning after a tweet from White House adviser Ivanka TrumpIvana (Ivanka) Marie TrumpTrump awards Yankees legend Mariano Rivera the Medal of Freedom The Hill's Morning Report - Trump takes 2020 roadshow to New Mexico 2020 is not a family affair, for a change MORE's account misspelled “United Kingdom.”

The misspelling occurred in a tweet congratulating Boris Johnson for becoming the U.K.’s next prime minister.

The tweet has since been deleted, but not before several users reposted screenshots of the message. 

Several reporters and other social media users knocked Trump about the mistake.

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Trump has since posted another tweet that fixes the spelling error. 

Johnson, the U.K.’s former foreign secretary and a fierce Brexit supporter, won the Conservative Party's leadership contest on Tuesday and will replace Theresa MayTheresa Mary MayMark Ruffalo dismisses Boris Johnson's comparisons to the Hulk: 'The Hulk only fights for the good of the whole' Queen Elizabeth to honor ex-British ambassador who called Trump 'inept' UK cabinet member resigns over Johnson's 'political vandalism' MORE as prime minister on Wednesday.

President TrumpDonald John TrumpJimmy Carter: 'I hope there's an age limit' on presidency White House fires DHS general counsel: report Trump to cap California trip with visit to the border MORE also congratulated Johnson, tweeting Tuesday morning, “He will be great!”