President-elect Donald Trump returned to the White House on Monday after being officially sworn in as the 47th president of the United States.
Inauguration Day includes a formal swearing-in ceremony as well as musical performances, a celebratory parade and formal balls in the evening.
J.D. Vince Goe also took the oath of office on Monday, joining Trump on stage to officially launch the new administration.
Trump also promised to celebrate a 'historic' day as he plans to sign 200 executive actions.
Everything you need to know about Trump's big day.
Timeline of inauguration
On the occasion of Donald Trump's inauguration, a viet service will begin for St. John's Church, Lafayette Square, a historic church in Washington, DC, with tea inside the White House.
Musical performances and opening remarks will begin at 09:30 EST (14:30 GMT) for the main event stage on the West Lawn of the US Capitol Building. Afta dat go be:
In addition to Trump and Vance's swearing-in, the president's inaugural address will be his goals for the next four years
Trump came to the president's room near the Senate camp to sign key documents
Come attend a luncheon hosted by the Joint Congressional Committee on Inaugural Ceremonies.
The parade ends on Pennsylvania Avenue from the Capitol Building to the White House.
Later in the evening, Trump will attend three inaugural balls throughout the city called the Commander-in-Chief Ball, The Liberty Inaugural Ball and the Starlight Ball.
What will be the opening?
Inauguration and formal ceremony marking the end of a president's time in office and the beginning of a new president's administration.
This is the most important part of the transition of power between government leaders for Washington, DC.
An important part of the ceremony includes the recitation of the oath of office of the president-elect: "I swear that I will faithfully execute the office of President of the United States, and that I will, to the best of my ability, protect will, protect and defend the Constitution of the United States."
Even though I won the November election, Trump will officially become the 47th president once I say these words.
I will go to Venice to take the oath of office and officially assume the office of Vice President.
The event also includes musical performances, speeches - during the event Trump will address his constituents and set out his goals for the next four years - and follow the parade, and celebratory balls.
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what will happen
On Trump's second inauguration day, St. John's Church, a church in Lafayette Square, Washington, D.C., begins a wit service, followed by a tea for the White House.
Musical performances and opening remarks are scheduled to begin at 9:30 a.m. Eastern (14:30 GMT) for the main event stage — located on the West Lawn of the U.S. Capitol.
E-GOD is followed by Trump and Venus' swearing-in as well as the inaugural address.
Trump moved inside the president's room — near the Senate chamber — to sign key documents to launch the new administration.
The Joint Congressional Committee on Inaugural Ceremonies hosts a luncheon that I go to attend.
D Parade - We march from the D Capitol down Pennsylvania Avenue to the White House - begin.
Later in the evening, Trump will attend three inaugural balls across the city — the Commander-in-Chief Ball, the Liberty Inaugural Ball and the Starlight Ball.
I expect I can speak for all three.
How to watch the opening ceremony?
There is usually a demand for tickets and hotcakes to see the opening ceremony.
Members of Congress get a certain number of tickets for the event, according to which they are divided into constituencies.
Tickets are free, but hard to get. Americans contact Congresspersons directly for tickets.
If you aren't able to attend Pesin, there are many ways to watch from afar.
Go to the live stream of the White House inauguration.
The BBC will carry the opening coverage live on our news channel.
You can also watch the opening sequence on our website and follow our live page, we bring you updates, analysis and highlights.
Who will attend the opening ceremony?
Local and federal officials expect about 200,000 pups to show up in Washington, D.C., drawing enthusiastic supporters as well as protesters.
Many US Senators and Congressmen Pep Go also attend, as well as guests from the incoming administration.
Along with the outgoing president and vice president, the Trump, Vance and Dea families were among the next most important attendees. That means we get to meet President Biden and Vice President Kamala Harris — who lost to Trump in the November election — their spouses, Jill Biden and Doug Emhof.
Former presidents and first ladies attend the inauguration ceremony.
This year, George and Laura Bush and Barack Obama are included, although Michelle Obama did not attend.
Who goes to perform?
Country singer and former American Idol winner Carrie Underwood will perform America the Beautiful during the opening ceremony.
"I love my country and I'm honored to be asked to sing for the inauguration and to be a small part of this historic event," Underwood said in a statement Monday.
"I am humbled to answer the call of the hour that we should all come together in a spirit of unity and look to the future."
The Villagers, an American disco group, will also perform for one of Trump's inaugural balls, The D-Group announced.