She won the race by more than seven seconds, breaking away from the pack in the final two kilometers to avenge her loss to Bjoergen in the 2014 Sochi Olympics.
Norway's Marit Bjørgen celebrates her silver medal in the women's 15km skiathlon event at the Winter Olympic Games on Saturday.
The PyeongChang Organising Committee has lined up a spectacular calendar of artistic and musical performances at the Medals Plaza.
But with her silver medal, Bjørgen still became the most decorated woman in Winter Olympics history.
In addition to witnessing Winter Olympians receiving their hard-won medals, fans can easily access the Superstore, where they can purchase official goods after checking out the Olympic cauldron and trying VR technology.
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Nicknamed "The Iron Lady", the 37-year-old Bjørgen won her eleventh Olympic medal, overtaking fellow cross-country skier Raisa Smetanina, who won 10 medals competing for the Soviet Union and the Unified Team between 1976 and 1992.
"I am very happy to take a medal in my last Olympics and still to be there", Bjørgen said. Third came Finland's Krista Parmakoski. "I am happy to be here at my age".
The world champion in the skiathlon, Bjørgen was the heavy favourite to claim the first gold medal of the 2018 Olympics as she had done in Vancouver in 2010 and again in Sochi four years later.
The Netherlands claimed four medals in just five minutes, with three Dutch women sweeping the 3,000m podium in the speed skating and Sjinkie Knegt taking silver in the short-track men's 1500m.