After formally taking office, President Trump declared: “We the citizens of America are now joined in a great national effort to rebuild our country and restore its promise for all of our people.
"Together we will determine the course of America and the world for many, many years to come.
"We will face challenges, we will confront hardships, but we will get the job done."
Donald Trump worn in as 45th President of the United States
The Democratic candidate, who suffered a devastating defeat on November 8, appeared steely-eyed before the arrival of the businessman.
However, she tweeted: "I'm here today to honor our democracy & its enduring values. I will never stop believing in our country & its future."
Ahead of the ceremony Mr Trump tweeted: "It all begins today! I will see you at 11:00 A.M. for the swearing-in. THE MOVEMENT CONTINUES – THE WORK BEGINS!"
Just hours before the inauguration ceremony, violent protests erupted in the streets of Washington and officers were forced to deployed tear gas to dispatch the rowdy crowds.
Donald Trump becomes 45th U.S. PRESIDENT
Fri, January 20, 2017
The inauguration of Donald Trump as the 45th President of the United States will mark the commencement of the four-year term of Donald Trump as President and Mike Pence as Vice President. A public ceremony will be held on Friday, January 20, 2017, on the West Front of the United States Capitol Building in Washington, D.C.
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U.S. President Donald Trump gives a thumbs up after being sworn in as the 45th president of the United States on the West front of the U.S. Capitol in Washington
In shocking footage, hooded men and women are marching, throwing over bins, smashing windows and spray-painting buildings could be seen as police chased them with batons and doused the demonstrators with pepper spray.
More protests are expected throughout the weekend as disgruntled Americans vowed to wreak havoc as President Trump celebrates his inauguration.
It followed a confrontation between protestors and police on Thursday evening outside a pro-Donald Trump black tie event, called the 'DeploraBall’.
The US secret service has been placed on high alert and are said to be searching more than 1,000 people an hour to thwart any potential attacks.