Kim Jong Un has committed to eventual denuclearization ahead of talks with President Trump in May, South Korean Foreign Minister Kang Kyung-wha said Sunday.

"The significance of his word is quite weighty in the sense that this is the first time that the words came directly from the North Korean supreme leader himself, and that has never been done before," Kyung-wha said on CBS News Sunday .

Kyung-wha said the North Korean leader has “given his word” on the matter.

Trump agreed to a meeting with Kim Jong Un, and it would be the first time an American president met with and participated in direct talks with the leader of North Korea.