Trump inauguration day: In pictures

President Trump and his wife Melania wave to the crowds as they walk during the inauguration parade on Pennsylvania Avenue

Among the parade participants are "troops" in period costumes

Anti-Trump protesters set alight a limousine on Washington's K Street

President Trump and the First Lady attend the presidential lunch

Former President Obama waves as he sets off in a helicopter to say the final goodbye to his staff, while newly elected President Trump and First Lady, Melania, return to business

President Donald Trump (left) and former President Barack Obama, with their wives behind them, during the US national anthem

Jackie Evancho, a 16-year-old former America's Got Talent contestant, sings the US national anthem at the ceremony

Enthusiastic members of the crowd cheer on the National Mall

President Trump is congratulated by his family after taking the oath of office, as former President Obama and his wife Michelle look on

Donald Trump pumps his fist after being sworn in as the 45th US president

Trump takes the oath as his wife Melania holds a bible

Mike Pence is sworn in as US vice-president, next to his wife, Karen Pence

Hillary Clinton, who lost the presidential race to Mr Trump, whispers into the ear of former president George W Bush ahead of the inauguration

President-elect Donald Trump arrives to applause

The media prepares for the ceremony in the rain

The Capitol building decked out with the stars and stripes

Protesters against Mr Trump gather near the Pennsylvania Avenue parade route

The motorcade carrying Barack Obama and Donald Trump rolls up Pennsylvania Avenue to the US Capitol for the swearing-in ceremony

It's all smiles for the cameras as Barack and Michelle Obama welcome Donald and Melania Trump to the White House for tea on the morning of the inauguration

Spectators gather in the National Mall in front of the US Capitol, braving cold and rain to secure a spot for the event

Rain ponchos are the accessory of the day as Trump supporters settle down for the long wait until the swearing-in ceremony and inauguration parade

Barack Obama leaves the White House for the last time, marking the end of eight years in office

For some it's a moment of great excitement, patriotism - and a reminder of Donald Trump's victory over his Democratic rival Hillary Clinton

But thousands of protesters have turned out to show their anger, with "not my president" proving a popular slogan on placards and signs

Protesters have been trying to block access to entry points to the National Mall, but this man was dragged away by police