North Korea has promised the US it is ready to discuss the future of its nuclear arsenal when the two nations’ leaders meet, US officials say.
Preparations for the summit have included secret, direct talks with North Korea, unnamed Trump administration sources said.
US and North Korean intelligence officials are said to have spoken many times, and met in a third country.
The unprecedented summit is slated to happen in May.
It will be the first time a sitting US president has met the leader of North Korea.
North Korea has already told South Korea it was prepared to address denuclearisation, but this is the first time assurances have been given to Washington directly.
Details of the leaders’ summit, including the location, remain unclear.
News of the talks between the US and North Korea surprised many when it broke in March.
It followed a year of threats, personal insults and nuclear brinkmanship between their respective leaders.
The North has previously halted missile and nuclear tests during past talks, only to resume them when it lost patience or felt its demands were not being met.