Trent Alexander-Arnold is the fifth-youngest player in Liverpool's history to reach 50 Premier League appearances.
After being named in the starting line-up for the Reds' encounter with Southampton on Friday night, Alexander-Arnold achieves the feat at the age of 20 years and 180 days.
The Academy graduate made his league debut in December 2016, appearing as a late substitute in a 3-0 win at Middlesbrough.
Youngest players to reach 50 Premier League appearances for Liverpool
Michael Owen - 18 years and 328 days
Raheem Sterling - 19 years and 83 days
Robbie Fowler - 19 years and 266 days
Steven Gerrard - 20 years and 152 days
Trent Alexander-Arnold - 20 years and 180 days
Jamie Redknapp - 20 years and 234 days
Steve McManaman - 20 years and 333 days
Jamie Carragher - 21 years and 79 days
David Ngog - 21 years and 241 days
Emre Can - 22 years and 21 days
Divock Origi - 22 years and 33 days