The incumbent president and president-elect have met at the White House the day after Donald Trump's victory was announced.
Barack Obama called the meeting "excellent", and Donald Trump said he is looking forward to receiving the outgoing president's "counsel".
The discussion in the president's Oval Office was scheduled for no more than 15 minutes, but ended up lasting almost an hour and a half.
However, Twitter has been quick to pick up on how mildly awkward the meeting seemed for both parties.
Afterwards, Obama said to Trump: "We now are going to want to do everything we can to help you succeed, because if you succeed the country succeeds."
According to Trump this was the first time the two had met - which seems a bit bizarre when they have both been so harshly critical of each other. But at least publicly, the two men appeared to put aside their animosity.
Trump said their talks had been wide-ranging, with Obama explaining to him "some of the difficulties" the country faced but also "some of the really great things that have been achieved".
The respectful tone adopted by the two men towards each other was in sharp contrast to the bitter, acrimonious exchanges which characterised the election campaign.
First lady Michelle Obama also met privately in the White House residence with Trump's wife Melania, where they discussed the challenges of raising children in the official residence.
Meanwhile vice president Joe Biden prepared to see vice president-elect Mike Pence later.