He will, however, remain within the Demilitarised Zone.
CIA Director Mike Pompeo with North Korean leader Kim Jong Un in early April 2018.
The historic summit between the two Koreas will begin at 9.30am local time (8.30am Singapore time) today.
If confirmed, Pompeo will replace Rex Tillerson, the former Exxon Mobil CEO fired by President Donald Trump on Twitter last month. He also said he was considering three or four dates as well as five possible locations, if it does go ahead.
That's why Kim's announcement he was closing a nuclear test site and suspending long-range missile launches produced a cautious response from knowledgeable arms experts and even some administration aides.
Crowds of supporters, holding signs calling for denuclearization, waved off the South Korean President as he left his residence in Seoul and his motorcade's hour-long drive north towards the DMZ was broadcast live to the world.
Every detail of the summit has been precisely planned - from the timetable to the dinner menu.
The White House also said it looks forward to continuing discussions with South Korea in preparation for the planned meeting of Trump and Kim in the coming weeks.
"Will two walk leaders, one with them, so they can talk eye to eye", - TASS quoted the official representative of the South Korean President.
Kim and Mr Moon will meet in a conference room on the second floor of Peace House at a newly-designed oval-shaped table with legs to resemble two bridges merging.
Kim was flanked by his sister and close adviser Kim Yo Jong and the North's head of inter-Korean relations, while Moon was accompanied by his spy chief and chief of staff.
It also said that after the talks Kim will plant a memorial tree with Moon, make public the results of the talks and attend a dinner hosted by Moon before returning to Pyongyang.
Mr Moon then joined Mr Kim on the northern side of the line, before both leaders stepped over to the southern side where the historic summit will take place.
The declaration of mutual agreement will be announced in the afternoon, followed by a dinner banquet carefully prepared to reflect wishes for peace and prosperity.
Killough told Newsy, "The third really important objective is, for the South Koreans, is to get Kim Jong-un on paper, on record, saying he's willing to talk about denuclearization".
"Panmunjom is an emblem of the national division", said Koh Yu-hwan, a professor of North Korea studies at Dongguk University in Seoul.
With the North's atomic arsenal high on the agenda, Moon responded that he hoped they would reach "a bold agreement so that we may give a big gift to the whole Korean people and the people who want peace".
Click through the gallery to see the key moments of the day.
"I think President Trump is serious about getting a victory out of this", Killough said.
"North Korea appears to take into account not only the inter-Korean summit but also the subsequent North-US summit and efforts for global co-operation".
South Korea's delegation is comprised of seven officials, including the ministers for defense, foreign affairs and unification.
The suit comes as the White House is preparing for a high-stakes meeting between President Trump and North Korean dictator Kim Jong Un, with the aim of trying to persuade the rogue nation to denuclearize. Moon vows to ramp up South Korea's capabilities and says dialogue between the Koreas has become "impossible" for the time being.