North Korea's official KCNA news agency said, North Korean leader Kim Jong-un has departed for Hanoi by train for talks with US President Donald Trump.
He arrived at the Chinese border city of Dandong after 21:00 local time (13:00 GMT) on Saturday.
The North Korean leader's sister Kim Yo Jong, who was also seen aiding him in Singapore, is travelling with Kim as well.
Other senior North Korean officials, such as his de facto chief of staff Kim Chang Son and Kim Hyok Chol, negotiations counterpart to U.S. envoy Stephen Biegun, were already in Hanoi to prepare for the summit.
Kim will also make an official goodwill visit to Vietnam "soon," KCNA said.
The much anticipated second US-North Korea summit is scheduled for Wednesday and Thursday in the Vietnamese capital.
It follows a historic first round of talks last year in Singapore. All eyes will be on what if any progress is made towards "denuclearisation".
The departure, confirmed by North Korean state media, is the first official acknowledgement that the talks are taking place.
On Feb. 26, Vietnam will ban traffic on the road Kim is expected to take to Hanoi from a station on the Chinese border, state media said.
Travel by train has been a favourite mode of transport for Kim Jong Un, as it was for his father, Kim Jong Il, and grandfather, Kim Il Sung.