Barack Hussein Obama became the 44th President of the US on Tuesday, but not before two stumbles on the way.

As Chief Justice John Roberts Jr. asked Obama if he was ready to take the oath, the president-elect replied in the affirmative.

But then he stumbled twice – beginning with the very first part of the oath, "I, Barak Hussein Obama, do swear…"

There was then a slightly longer pause, as Obama waited for Roberts to repeat the words, “I will faithfully executive the office of President of the United States….”

“Faithfully,” repeated Roberts helpfully.

And Obama then reeled off the line with the ease of the speaker that he is known to be.