President Barack Obama and Vice President Joe Biden took oaths for the 2nd term in office in low-key ceremonies on January 20, 2013.
He will be sworn in publicly on Monday outside the West Front of the Capitol overlooking the National Mall in front of as many as 800,000 people, a much bigger ceremony replete with a major address and a parade.
Here are some images from the historic event.
President Obama has thus become only the 17th U.S. leader to be sworn in for the second term.
He will now begin the second half of his presidency facing some of the same challenges that he struggled with in the first half.
U.S. President Barack Obama took the oath of office at the White House as first lady Michelle Obama held the Bible during the official swearing-in ceremony.
U.S. President Barack Obama hugs his wife Michelle as their daughters Malia and Sasha look on.
U.S. President Barack Obama hugs his daughter Malia as wife Michelle and daughter Sasha look on.
U.S. Vice President Joe Biden took the oath of office from Supreme Court Justice Sonia Sotomayor as his wife Jill Biden held the family Bible while family members looked on at the U.S. Naval Observatory in Washington January 20, 2013.
U.S. Vice President Joe Biden hugs his wife Jill after taking the oath of office.
U.S. President Barack Obama is kissed by first lady Michelle Obama at the inaugural reception at the National Building Museum in Washington on January 20, 2013. Seen at right is Vice President Joe Biden.
First lady Michelle Obama, Vice President Joe Biden and his wife Jill Biden attend watch on as U.S. President Barack Obama talks during the inaugural reception at the National Building Museum in Washington.