US President Donald Trump and North Korea's leader Kim Jong-un are meeting at the start of their high-profile summit in Vietnam's capital, Hanoi.
The pair shook hands for the media before heading to talks and dinner at the five-star Metropole hotel.
They are expected to discuss a roadmap for ridding the Korean peninsula of nuclear weapons in two days of talks.
There has been little progress on that and other issues since the first Trump-Kim summit in Singapore last year.
Mr Trump said he thought this latest meeting would be "very successful".
Earlier, he tweeted in praise of the host country on Wednesday morning, writing: "Vietnam is thriving like few places on earth. North Korea would be the same, and very quickly, if it would denuclearize."