Dundee United old boys Ray McKinnon and Charlie Telfer will be linking up together at Morton.
The 22-year-old midfielder has signed a one-year deal after returning to Scotland following a spell playing in the Netherlands with Almere City.
McKinnon said: “We’re absolutely delighted to have Charlie on board.
“He’s a top-class football player, a fantastic professional, who I know very well from my time at Dundee United. He played almost every game as we went to the play-offs.
“I recognised what type of player Charlie was – a ball player who likes to keep possession and pass.
“We knew his contract was coming up and we’d been in contact over the last three or four weeks and I’m thrilled to have been able to entice him to Morton.
“There were two or three other clubs interested but we’d been at him constantly and the way we’d worked together previously probably swung it our favour. He’ll be a great addition to the Morton squad.”