Harvey Elliott joined Liverpool in the summer of 2019.
The winger moved to the club after a breakthrough season with Fulham in which he made three senior appearances for the Cottagers.
That included a record-breaking Premier League debut at the age of 16 years and 30 days when he came on as a substitute against Wolverhampton Wanderers.
Elliott, a boyhood Reds fan, has also represented England at youth international level.
“I’ll work as hard as I possibly can for the club and I feel Anfield is the perfect place for me to develop and progress as a player,” he said when the switch was announced.