First Lady Jill Biden uttered a major slip-of-the-tongue this week when she accidentally introduced Kamala Harris as the “President of the United States.”

“As many of you know, our Vice President’s historic path to the White House began before she could even walk, marching with her parents in the Civil Rights movement,” said the First Lady.

“She is a partner to Joe, especially on issues like Voting Rights… Ladies and Gentlemen, the President of the United… The Vice President!” stammered Dr. Biden. “I just said that to make you laugh!”

The mix-up comes hours before Joe Biden is set to deliver his State of the Union address inside the chambers of the House of Representatives at the US Capitol.

In response to Mr. Biden’s big night, the term #SlurOfTheUnion is already trending on Twitter.

Watch Jill’s mistake above.