Yarnold will lead Team GB athletes into the PyeongChang Olympic Stadium where the Opening Ceremony will officially mark the start of the 23rd Olympic Winter Games. Team GB's 59 athletes are set to compete across 11 sports in the 16 days of competition that follow.
The 29-year-old, who was also chosen as Flagbearer for the Closing Ceremony four years ago at Sochi 2014, will look to defend her title when the women's event gets underway on Friday 16th February.
Yarnold is aiming to become the first British Winter Olympian to retain her Olympic crown, with her success in Sochi following three successive skeleton medals with gold for Amy Williams in 2010, silver for Shelley Rudman in 2006 and bronze for Alex Coomber in 2002.
The winning margin of 0.97 seconds in Sochi was the largest in Olympic history as Yarnold registered two track records and the fastest down time in each of the four runs.
Yarnold won every major accolade in the sport in just 407 days across 2014 and 2015, with an overall World Cup season win, a European Championship title and a World Championship crown completing a remarkable 14-month stint for the former heptathlete.
The current World Cup campaign began with another bronze in the opening race in Lake Placid in November and concluded with a 4th-place finish in Konigssee last month as she placed 9th in the overall World Cup rankings.
Mike Hay, Team GB Chef de Mission for PyeongChang 2018, said: "As a defending champion and model athlete, Lizzy is the ideal choice to lead Team GB into the Olympic Stadium tomorrow evening"
