Kim Jong Un's sister arrived at a train station Friday morning.
Pence, who led the U.S. delegation, was seated between South Korean President Moon Jae-in and Japanese Prime Minister Shinzo Abe, with Kim Yo Jong and Kim Yong Nam, North Korea's 90-year-old nominal head of state, seated a row behind.
South Korean Ambassador to Russia Woo Yoon-keun said on Friday the competition will contribute to easing tensions both on the Korean Peninsula, and in the world. North Korean athletes and performers will even appear in the South.
Performances during the ceremony showcased the sweep of Korean history and culture, with the performance entitled "The Land of Peace".
The two made their way to the media area and saluted the crowd, but were eventually escorted out of the stadium, according to Yahoo Sports.
Moon also met with North Korea's ceremonial head of state Kim Yong-nam, the highest-ranking North Korean official to visit the Republic.
The Moons, Nam and Kim all stood again as athletes from both Koreas marched together behind a blue-and-white "unification" flag for the first time since 2007. The two countries are officially at war and in today's context this was quite notable.
The ersatz Kim, who is based in Hong Kong, also expressed hope that "the real Donald Trump and Kim Jong Un could also get on and not start World War Three".
Moon's chief press secretary Yoon Young-chan later explained that the USA vice president was originally scheduled to hold separate dinner with US athletes at the PyeongChang Olympic Games, insisting his early departure did not mean a boycott.