Louis Lynagh will leave Harlequins at the end of the season to join Italian side Benetton Rugby.
Lynagh made his senior debut in 2019 and has made a total of 58 appearances for Quins.
“It’s been a difficult decision to leave my boyhood club, but I feel the time is right for a new challenge in Italy,” he said.
Harlequins director of rugby Billy Millard said: “Louis has been a pleasure to work with and we have been proud to see him develop from our academy to the first-team squad.
“We wish him the very best as he seeks to build his career in Italy.”