Trump's inauguration today, more than 50 House Democrats to boycott
Hundreds of thousands of people are expected to stream into Washington today to watch as President-elect Donald Trump is sworn in as the 45th US president.
All eyes will be on the US Capitol as Trump formally replaces President Barack Obama in the White House.
President Obama and the first lady will accompany Trump and his wife in a motorcade to the US Capitol for the official ceremony, where they will be joined by members of Congress, politicians as well as supporters.
At noon Trump will recite the oath of office, administered by the Chief Justice.
Following the oath, Trump will deliver his inaugural address.
The ceremony is then followed by a parade down Pennsylvania Avenue and later celebrated through a series of inaugural balls.
Former President Bill Clinton and his wife Hillary Clinton, who lost to Trump in November's election, are expected to attend.
George W. Bush and his wife, Laura, as well as Jimmy Carter have also confirmed they will attend the ceremony.
An estimated 800,000 to 900,000 people are expected to flood the nation's capital for the inauguration, but it is unclear whether they will be there in celebration or protest.
A rising number of Democratic lawmakers have said they plan to boycott.
More than 50 House Democrats are refusing to watch as Trump is sworn in amid a feud between the newly elected president and the civil rights activist and congressman, John Lewis.
President Barack Obama drew an estimated 1.8 million people to Washington when he took office eight years ago.
The soon-to-be 45th president has vowed to roll back many of Obama's policies on day one in office, but it is unclear whether that begins today or Monday.
Trump spokesman Sean Spicer told a news conference on Wednesday the president-elect may take four or five executive actions after he is sworn in today.