The phrase “Prince of Whales” became a trending topic on Twitter Thursday morning after a tweet from President TrumpDonald John TrumpUSPS warns Pennsylvania mail-in ballots may not be delivered in time to be counted Michael Cohen book accuses Trump of corruption, fraud Trump requests mail-in ballot for Florida congressional primary MORE in which he misspelled the title of the United Kingdom's Prince Charles.

“I meet and talk to ‘foreign governments’ every day," the president tweeted. "I just met with the Queen of England (U.K.), the Prince of Whales, the P.M. of the United Kingdom, the P.M. of Ireland, the President of France and the President of Poland. We talked about ‘Everything!’”

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Trump recently met with Prince Charles, the prince of Wales, during his state visit to the U.K. earlier this month.

Trump's tweet was meant to defend comments he made in an interview Wednesday, during which he told ABC’s George StephanopoulosGeorge Robert StephanopoulosSchumer declines to say whether Trump executive orders are legal: They don't 'do the job' Meadows defends US COVID-19 testing amid criticism Meadows says White House is 'hopeful' it can announce new coronavirus therapies 'in the coming days' MORE that he would listen to a foreign entity with damaging information on a political opponent, equating it with his diplomatic contacts with foreign leaders. FBI Director Christopher Wray has said contacting the FBI would be the correct protocol.

Though he quickly issued a new tweet with the correct spelling, Twitter users had already jumped on the president's gaffe.

Hazel Shearing, a BuzzFeed UK reporter, jokingly shared the “first photos in from Trump’s meeting with the Prince of Whales.”

CNN commentator Keith Boykin tweeted: “When the very stable genius in the White House tweets about the Prince of Whales. ”

Dictionary.com’s official twitter account provided a helpful guide for social media users.

Others chimed in with their own jokes and memes mocking the president's spelling.

The phrase was shared more than 20,000 times on Twitter as of Thursday morning and was the No. 1 trending topic in the U.S.