U.S. President Donald Trump on Tuesday insisted that North Korea's denuclearization process will start "very quickly," as the pair wrapped up an unprecedented meeting on Singapore Sentosa Island.
The two leaders signed what was described as a "comprehensive" deal in front of international camera crews, although details of the agreement were not immediately disclosed.
Trump said he would reveal more information about the pact later in the day, with analysts questioning whether both parties would be able to agree to conditions for the North's denuclearization.
The American president was full of praise for his "very smart" North Korean counterpart, describing their "very special bond" and a total shift in Washington's relationship with Pyongyang.
North Korea has repeatedly threatened to attack the U.S., after decades of hostility and suspicion since the 1950-53 Korean War closed with a ceasefire. Trump increasingly hit back with his own rhetoric since taking office last year.
But Kim told reporters at the Capella Hotel that they have chosen to "leave the past behind."
Trump also confirmed he would invite the North's leader to the White House.
By Alex Jensen in Seoul