Edinburgh have agreed a two-year deal with Melrose and Scotland U20 winger Damien Hoyland from this summer.
Hoyland, a former James Gillespie's high school pupil, is regarded as one of the country's brightest prospects and is a regular try-scorer boasting a searing turn of pace.
The 20-year-old has crossed for six tries for the U20 national side, two of which came in their Six Nations win over Ireland last season.
Hoyland said: "I've always dreamed that I might get this chance since I started playing rugby so I'm absolutely delighted, especially as it's with Edinburgh Rugby who I've supported from a young age. It's quite surreal really.
"I was invited to spend a couple of months with the squad from October to December which really helped. I met and travelled with the team and was exposed to the intensity of their training.
"It's taken a huge amount of work and support to get me to this point. I've been fortunate to have a lot of good people around me who have helped my rugby develop.
"I'd like to thank my family, friends, the Institute of Sport, former club Boroughmuir and Rob Chrystie at Telford College and Melrose for preparing for this opportunity. Hopefully I'll do them all proud."
Edinburgh coach Alan Solomons added: "I heard about Damien [Hoyland] through the feedback we receive from the domestic club scene and the scouts and coaches we have watching games in the RBS Premiership.
"We had a closer look at him in training at Murrayfield and have taken him on a couple of away matches to introduce him to our squad and set-up, and show him how we operate."