The “United Kingston” trended Tuesday morning after a tweet from White House adviser Ivanka TrumpIvana (Ivanka) Marie TrumpTrump administration awarding M in housing grants to human trafficking survivors Deutsche Bank launches investigation into longtime banker of Trump, Kushner Watchdog group accuses Stephen Miller of violating Hatch Act with Biden comments 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 MayAre US-Japan relations on the rocks? Trump insulted UK's May, called Germany's Merkel 'stupid' in calls: report Bolton says Boris Johnson is 'playing Trump like a fiddle' MORE as prime minister on Wednesday.

President TrumpDonald John TrumpMark Kelly clinches Democratic Senate nod in Arizona Trump camp considering White House South Lawn for convention speech: reports Longtime Rep. Lacy Clay defeated in Missouri Democratic primary MORE also congratulated Johnson, tweeting Tuesday morning, “He will be great!”