The key moments of Donald Trump's inauguration day

PHOTO: The sun rises over the US Capitol on the National Mall before US President-elect Donald Trump is to be sworn in. (Reuters: James Lawler Duggan)

PHOTO: President-elect Donald Trump and his wife Melania arrive for a church service at St John's Episcopal Church. (AP Photo: Alex Brandon)

PHOTO: President Barack Obama and first lady Michelle Obama met with President-elect Donald Trump and his wife Melania Trump before the swearing-in. (AP Photo: Evan Vucci)

President Obama invited the Trumps to the White House for tea before the incoming and outgoing presidents travel to the swearing-in ceremony together.

PHOTO: President Barack Obama and President-elect Donald Trump's motorcade drives down Pennsylvania Avenue on the way to the swearing-in ceremony. (AP Photo: Susan Walsh)

PHOTO: Former Sen. Hillary Clinton and former President Bill Clinton arrive on the West Front of the U.S. Capitol. (AP: Win McNamee)

Hillary Clinton tweeted "I'm here today to honor our democracy & its enduring values. I will never stop believing in our country & its future."

PHOTO: Donald Trump supporters gather in the National Mall (Reuters: Shannon Stapleton)

PHOTO: President-elect Donald Trump arrives on Capitol Hill. (AP: Doug Mills)

PHOTO: President-elect Donald Trump pumps his fist as he arrives. (AP: Patrick Semansky)

PHOTO: President-elect Donald Trump shakes hands with President Barack Obama. (AP: Patrick Semansky)

Finally the time came for Donald Trump to step forward and take the oath of office, with Chief Justice John Roberts swearing in him and his Vice-President, Mike Pence.

PHOTO: Vice-President Mike Pence takes his oath of office. (AP: Matt Rourke)

PHOTO: Donald Trump is sworn in as the 45th President of the United States. (AP: Andrew Harnik)

President Trump then stepped up to the lectern to deliver his inaugural address. He made a bunch of wide ranging promises during the 16 minute speech.

PHOTO: Crowds watch as President Donald Trump delivers his inaugural address. (Reuters: Ricky Carioti)

PHOTO: Donald Trump used his first presidential address to promise to make America great again. (AP: Patrick Semansky)

PHOTO: U.S. President Donald Trump acknowledges the crowd. (Reuters: Saul Loeb)

PHOTO: Introducing … President Trump. (AP: Patrick Semansky)

It was then time for Barack Obama and Joe Biden to leave the Capitol. The new President and Vice-President followed tradition and escorted their predecessors to Marine One.

PHOTO: Former President Barack Obama waves from a helicopter as President Donald Trump walks with wife Melania Trump back to the Capitol Building. (AP: John Angelillo)

PHOTO: President Donald Trump is joined by the Congressional leadership and his family as he formally signs his cabinet nominations into law. (AP: J. Scott Applewhite)

PHOTO: US President Donald Trump and first lady Melania attend the Inaugural luncheon. (Reuters: Yuri Gripas )