Vasil Lobzhanidze will become the youngest player in World Cup history after being named in the Georgia team to face Tonga on Saturdays.
Lobzhanidze does not turn 19 until next month, and his selection at scrum-half will see him break the record set by Thretton Palamo, who played for the USA against South Africa in 2007.
"Just a few years ago, I would not have imagined that I would play for the Georgian national team, let alone at a World Cup," he told reporters.
"It is a dream come true, it's a fantastic feeling."
Georgia have won just one pool game at each of the last two World Cups.
