Trent Alexander Arnold (19 years & 10 days) vs NK Maribor October 2017
David Ngog (19 years and 252 days) vs PSV Eindhoven December 2008
Curtis Jones (19 years & 306 days) vs Ajax Amsterdam December 2020

All of these are in the competition proper- group stages and ahead (no qualifying goals, otherwise TAA’s first UCL goal was against Hoffenheim in a qualifier)

Who is Liverpool’s youngest ever Champions League goal scorer

Liverpool’s youngest ever UCL goal scorer is Trent Alexander Arnold, who achieved it at the age of 19 years and 10 days against Slovenian outfit Maribor. Trent beat the record of David Ngog, who scored in LFC’s 3-1 win over PSV in the 2008/09 season at 19 years and 252 days.