South African lock George Earle has agreed a deal to move to the Scarlets at the end of the Super Rugby season.
The 25-year-old has made nine appearances this year for the Cheetahs - impressing with his work in the lineout and loose.
And coach Nigel Davies believes Earle, who has also played for Western Province, the Lions and the Griquas, will add a physical dimension to his side's pack.
Davies told the club's official site: "This is a significant signing for the Scarlets, George is in his prime as a player and is ambitious to make a mark over here. He will bring a tough edge and different set of experiences from his career in Super 15.
"He gives a new dimension to our second row options and we know we need to enhance and strengthen our set piece play going into the big competitions next season, particularly in Europe.
"This is an important and exciting new addition to the Scarlets squad for next season. He's really looking forward to joining the group of players here at Parc y Scarlets, and keen to get his first taste of northern hemisphere rugby and make an impact in the league and European competitions.
"It's key to have secured a quality second row, who at 25, has enough experience but also plenty to give and hunger to achieve over the next three seasons at Parc y Scarlets. He's an aggressive and focused player with a high work rate and has the ability to add a real edge to our game."
Earle is hoping that his move to the Scarlets will open the door for him to play for Wales, once he has served the required residency period.