Petter Northug Jr. (born 6 January 1986) is a Norwegian former cross-country skier and double Olympic champion. He won a total of 13 World Championship and two Winter Olympic gold medals with 20 medals overall (two gold, one silver and one bronze at the Olympics, 13 gold and three silver at the World Ski Championships), and 18 individual FIS Cross-Country World Cup wins with 13 podium places. He is also the record holder for most stage wins (13) in Tour de Ski.
https://en.wikipedia.org/wiki/Petter_Northug