Midfielder Mark Reilly has followed former St Johnstone team-mate Mixu Paatelainen to St Mirren.
Mark Reilly (left) and Mixu Paatelainen at Love Street
Both players have signed one-year deals at Love Street, with Paatelainen also employed in a coaching role.
"It's a young squad here so Mixu and myself will bring in some experience," Reilly told the Buddies' website.
"I hope our attitude towards the game, our desire and hunger to win football matches, will rub off on the rest of the players and the younger boys."