Donald Trump plans to tell Americans that he hops to usher in a "thrilling new era of national success", according to excerpts of his inauguration speech obtained by CBS, the BBC's US partner.
In his remarks, Trump is also expected to say that a "tide of change is sweeping the country".
He will also outline a "series of historic executive orders" to begin his presidency.
It has previously been reported that as approximately 200 executive actions might be signed today alone, including on immigration, the US-Mexico border and the economy.
"With these actions, we will begin the complete restoration of America and the revolution of common sense," he will add.
"My message to Americans today is that it is time for us to once again act with courage, vigour and the vitality of history's greatest civilisation".
BBC