Aberdeen has announced the signing of Leighton Clarkson on a four-year contract from English Premier League side Liverpool.
The 21-year-old enjoyed a successful loan spell at Pittodrie last season, playing 29 times to help the Reds finish third in the cinch Premiership.
"There is no doubt Leighton had a positive impact during his time with us last season and its hugely encouraging that he has now chosen this club as his home, and the best place for his continued development," Dons boss Barry Robson told the club's website.
"He is a brilliant prospect and exactly the type of player we want here at the club. He’s young, hungry, and technically very good.
"He was much admired for the creativity he brought on the pitch and showed a real affinity with the supporters during his time at Pittodrie last season."