He will officially take his place as the new President of the United States.
Donald Trump's taken the oath of office, and has been sworn in as the 47th President of the United States.
In his inauguration speech, he set out plans to send troops to the border with Mexico, where he'll declare a 'national emergency.'
Among the hundreds of guests were former US presidents, as well as Tesla owner Elon Musk.
Former NYPD Officer, living in Milltownpass in Westmeath, Tom O' Hara says America will be completely different in the next four years: