Marina Charlotte Kalla (born 22 July 1987 in Tärendö) is a Swedish cross-country skier who has been competing at international level since the 2003–04 season. Kalla is a three-time Olympian, winning her first Olympic gold medal at the 2010 Winter Olympics in the 10 km freestyle event in Vancouver. At the 2014 Winter Olympics in Sochi Kalla ran the final leg in the 4 × 5 km women's relay race and started third with a 25.7 seconds lag behind the first place but reduced the gap, overtaking her competitors in the final straight, earning Sweden the first gold medal in the women's relay event since 1968. At the 2018 Winter Olympics in Pyeongchang Kalla won Olympic gold medal in the skiathlon event.