
The dignitaries watching Donald Trump’s inauguration on the Capitol Hill dais in Washington, DC, are witnessing history up close – and are having a good time while doing it.

Arizona Senator John McCain was seen giving the ‘bunny fingers’ to an identified member of the audience.

McCain arrived at the inauguration with his friend, Vermont Senator Bernie Sanders.

The friendship is notable given the vast ideological differences between the longtime Republican, McCain, and the social democrat Sanders.

President Donald Trump (far left) holds up his right hand and takes the oath of office, administered by Supreme Court Chief Justice John Roberts (far right). First Lady Melania Trump (second from left); her son, Barron (third from left); her stepdaughter, Ivanka; her stepson, Eric; and her other stepdaughter, Tiffany, look on

The dignitaries watching President-elect Donald Trump’s inauguration on the Capitol Hill dais in Washington, DC, are witnessing history up close – and are having a good time while doing it. Mike Pence is seen above taking the oath of office

Arizona Senator John McCain gives 'bunny ears' to a man posing for a photo with Senator Elizabeth Warren (left, behind the photo taker) and Senator Debbie Stabenow (right)

Senators Bernie Sanders (left), John McCain (second from left), Elizabeth Warren (center) and Debbie Stabenow (R) attend the inauguration ceremonies at the US Capitol in Washington

McCain and Sanders pose for a selfie with Senator Amy Klobuchar, the Minnesota senator, at the US Capitol on Friday

McCain (left) speaks to former Vice President Dan Quayle (right) as Sanders (foreground) looks on

Huma Abedin, a top aide to Hillary Clinton, arrives near the front steps of the Capitol Building before the inauguration

Texas Senator Ted Cruz, who lost in the Republican primary to Trump, arrives for the inauguration in Washington

Rex Tillerson (right), the former ExxonMobil executive picked by Trump to be his secretary of state, attends the inauguration along with his wife, Renda

Steven Mnuchin, the former Goldman Sachs executive who faced a bruising confirmation hearing on Thursday from Senators who will be asked to approve his nomination as treasury secretary, was in attendance with his wife

Michael Flynn, the retired general picked by Trump to be his national security adviser, wears a somber look before the inauguration

Senator Tim Kaine of Virginia, Hillary Clinton's running mate, arrives for the inauguration wearing a smile

Steve Bannon, appointed chief strategist and senior counselor to Trump, arrives on Capitol Hill in Washington

Former Vice President Dick Cheney (left) and his wife, Lynne, were also on hand to see the inauguration

Just minutes before he steps down as president, Barack Obama greets the justices of the Supreme Court. Above he shakes hands with Clarence Thomas

Supreme Court Justice Stephen Bryer (far right) assists Justice Ruth Bader Ginsburg (second from left) with a rain poncho during inauguration ceremonies

Trent Lott, the former Senate Majority Leader, gestures as he escorts his wife, Patricia, to their seat

Former Speaker of the House Newt Gingrich (far left), his wife Callista Gingrich (second from left), former Speaker of the House John Boehner (second from right), and his wife Deborah Boehner arrive on the West Front of the US Capitol on Friday

McCain was also seen conversing with former Vice President Dan Quayle.

Other notable figures in the audience include Senator Elizabeth Warren of Massachusetts, Senator Ted Cruz of Texas, and former Vice President Dick Cheney and his wife, Lynne.

Huma Abedin, a senior aide to Hillary Clinton, was seen near the east front steps of the Capitol Building before Trump was sworn in.

Another key figure from the Clinton campaign who was in attendance was Tim Kaine, the Virginia senator who was picked to be the Democratic nominee's running mate.

A number of newly appointed aides who will be advising Trump were also in attendance.

Steve Bannon, who on Friday officially became a chief strategist for President Trump, was on hand to view the festivities.

Michael Flynn, the former general who was appointed national security adviser by Trump, also was there at the Capitol.

Rex Tillerson, the former ExxonMobil executive who was tapped to be secretary of state pending confirmation by the Senate, was on hand with his wife, Renda.

Steven Mnuchin, the former Goldman Sachs executive who faced a bruising confirmation hearing on Thursday from Senators who will be asked to approve his nomination as treasury secretary, was in attendance with his wife.

The Supreme Court justices were also on hand.

Barack Obama, the now-former president, was seen shaking hands with Justice Clarence Thomas.

In one photo, Justice Stephen Bryer is seen assisting Justice Ruth Bader Ginsburg with a rain poncho.