Joe Biden has been sworn in as the 46th United States President.
Biden took his oath of office on Wednesday at the Capitol in Washington D.C.
Chief Justice, John Roberts Jr, administered the pledge at exactly 11:48 am ET.
Biden takes the reins of US presidency after four years of tumult under Donald Trump who in an extraordinary final act snubbed the inauguration.
Also, former California Senator Kamala Harris was sworn in as vice president of the United States on Wednesday, the first woman ever to hold the post.
Harris, 56, took the oath of office from Supreme Court Justice Sonia Sotomayor in a ceremony at the US Capitol.
She is the first Black woman and the first woman of South Asian descent to become US vice president.
Kamala Harris did the same before him after the national anthem rendition by Lady Gaga.
“It’s a new day in America,” Biden wrote on Twitter before the inauguration as, in a sign of his push for unity, he prayed alongside congressional leaders at a Roman Catholic church.
Biden, who at 78 is the oldest president in US history and only the second Catholic, took office amid enormous challenges with the still-raging Covid-19 pandemic having claimed 400,000 lives in the United States.