North Korean leader Kim Jong-un sent a letter to South Korean President Moon Jae-in calling for more peace talks between the leaders in the new year following their active engagement in 2018, South Korea's presidential office said.
In an attempt to start working-level negotiations, the USA said it would review its policy on humanitarian aid to North Korea.
Kim's letter has renewed hopes for inter-Korean relations in 2019 - ending weeks of lackluster communication between the two Koreas as the North's denuclearization talks with the US have gone off the boil.
Through three summits between Moon and Kim this year, the Koreas agreed to a variety of goodwill gestures and vowed to resume economic cooperation when possible, voicing optimism that global sanctions could end to allow such activity.
But the USA maintains it will keep sanctions in place against North Korea.
During Moon's visit to Pyongyang in September, Kim promised to pay a return visit to Seoul "at an earliest date", sparking speculation that he may visit by the end of this year.
In recent months, South Korean fan clubs of the leader have reportedly sprung up as the South anticipates frequent visits from as ties warm up between the two countries.More news: Russian Federation arrests U.S. citizen on suspicion of espionage
The North's leader "expressed a strong determination to visit Seoul while watching [the] future situation", Moon's spokesman Kim Eui-kyeom told reporters.
"Chairman Kim said he is willing to meet often with President Moon next year to move forward discussions on peace and prosperity and resolve the issue of denuclearization of the Korean peninsula", the spokesman said.
Cheong Wa Dae announced on Sunday that Kim expressed in the letter an intent to work together with South Korea on the issue of denuclearization, cooperate for peace and prosperity on the Korean Peninsula and honor his promise to make a trip to South Korea.
North Korean state media said the removal of the U.S.'s nuclear weapons from the region was a condition of its own disarmament, raising the stakes for Trump's efforts to hold a second summit with Kim. Officials have yet to discuss what the message exactly said.
Post-summit nuclear talks between Washington and Pyongyang quickly settled into a stalemate as the countries struggled between the sequencing of the North's disarmament and the removal of US -led worldwide sanctions against the North.