Cardiff Rugby can confirm Owen Lane will leave the club at the end of the season to join Valance Romans in France.
The 26-year-old came through the Cardiff pathway system and burst onto the scene during the 2017-18 season, which culminated in winning the European Challenge Cup.
In total, the wing has made 92 appearances for the Blue and Blacks, scoring 43 tries.
Lane said: “I am forever grateful for the opportunity to represent my boyhood club that I grew up supporting. It truly was a dream come true progressing from Whitchurch to Cardiff RFC to the first team squad.
“The club also gave me the opportunity to represent my country which was something I could only dream of as a child.
“I have made friends both on and off the pitch that will last a lifetime and Cardiff will always be home. It’s where mine and my partner’s family are and I will always class Cardiff as my club.
“Moving to France is a chance for me and Lucy to experience a different culture and league, which is a new and exciting challenge for me both on and off the field.”