President Donald Trump and North Korean leader Kim Jong Un have signed an unspecified agreement.
While no further details have been supplied, Mr Trump told reporters in Singapore it was an "important" and "comprehensive" document.
"People are going to be very impressed, people are going to be very happy," he said.
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"You will be seeing everything in just a little while, the letter that we are signing is very comprehensive, and I think both sides will be very impressed by the results."
Mr Trump and Mr Kim met for the first time in Singapore on Tuesday, and had a 45-minute one-on-one discussion before being joined by aides and advisors.
After emerging from a working lunch earlier on Tuesday, Mr Trump was asked how the talks were going and said: "A lot of progress - really very positive. I think better than anybody could have expected. Top of the line, very good. We're going now for a signing."
Mr Trump made the remarks as he and a Mr Kim walked around Singapore's Capella hotel, after discussing ways to end the nuclear standoff on the Korean peninsula.
The two strolled in a courtyard flanked by palm trees and tall grass before briefly talking with reporters.
Mr Trump guided Mr Kim to his presidential limousine, and an aide opened the door, as Mr Trump invited Kim to peer inside.