Republican Donald Trump is expected to celebrate his stunning win over Democrat Hillary Clinton and take the stage as the U.S. president-elect for the first time at his victory party Wednesday at the New York Hilton Midtown hotel.

Completing a massive upset after many news outlets and polls predicted a resounding Trump defeat and overwhelming Clinton win, the 70-year-old businessman and New York native secured key battleground states such as Florida and Ohio in Tuesday's elections.

Trump stands to become the oldest president-elect in U.S. history and the first never to hold any elected office prior to assuming the presidency. He will succeed outgoing President Barack Obama on Inauguration Day, Jan. 20, 2017, when he takes the oath of office and becomes the 45th president in the country’s history.

To most Americans, when Trump announced his candidacy for the 2016 presidential election on June 16, 2015, the move was seen as little more than an opportunity for the billionaire and reality television star to drum up publicity. Some even derided the announcement as a joke on that date and continued to do so throughout one of the most contentious elections in U.S. history.

Instead, over the next 17 months, Trump gained steam on issues like immigration, U.S. trade policies and agreements, foreign policy and Clinton’s fitness to serve in route to both capturing the Republican Party’s nomination and splintering its base.

Trump, as well as running mate and vice president-elect Mike Pence, will attend the invitation-only event in the heart of Manhattan and only a few blocks away from Trump Tower, the campaign’s main headquarters throughout the election.

The victory and the speech will be a day removed from a campaign whirlwind in the days leading up to the election. On Monday, Trump held events and stumped in major swing states Pennsylvania, Florida, North Carolina, Michigan, and New Hampshire, speaking to massive crowds and urging each to head to the polls.

Trump’s full victory speech can be watched live online via YouTube or below.