Video: Who is Kim Jong-un’s sister? Everything we know about Kim Yo Jong
Unconfirmed rumours of Kim Jong-un’s declining health triggered speculation about who could succeed him at the helm of the most secretive regime in the world.
It remains unknown whether the North Korean leader, who is believed to be only 36, has officially designated a successor, or whether the reclusive country would be temporarily ruled by an elite group of elders and figureheads.
In North Korea, Kim Jong-un is the single face and leader of the regime. But behind the scenes, his sister is a powerful key player at the decision table, says the Telegraph's Asia correspondent Nicola Smith.
Watch the video to find out what we know about his sister and potential successor, Kim Yo Jong.