Trump heading to church, then to see Obama

President-elect Donald Trump has emerged from Blair House to start the Inauguration Day festivities.

Trump and his wife, Melania, stepped out of the government guest house next to the White House just after 8.30 am (0030 AEDT) and took a motorcade for the short drive to St John's Episcopal Church.

Vice President-elect Mike Pence is also attending the service.

After the prayer service, they'll head to the White House to be greeted by President Barack Obama before the swearing in ceremony.

The incoming president started his day by tweeting: "It all begins today! I will see you at 11:00 A.M. for the swearing-in. THE MOVEMENT CONTINUES - THE WORK BEGINS!"

Meanwhile, protesters who said they'd try to keep guests with tickets from watching Trump take the oath of office aren't having much luck so far.

Dozens of protesters are lined up at the entrance to a seating area on the West Front of the Capitol, and they're holding signs that say "Free Palestine" and "Let Freedom ring."

But police are out in force, and they're allowing ticketholders to make their way through the gate. On the other side of the Capitol, things are quiet and orderly at a second gate.

Kevin Puchalski is a 24-year-old construction worker who drove to Washington from Philadelphia with two friends to see Donald Trump's inauguration.

He says: "I'm here for history. This is the first president that I voted for that won."