Aberdeen defender Declan Gallagher is now a Buddie after signing for the Paisley club.
He is expected to join his new teammates tomorrow ahead of their pre-season training camp in Northern Ireland.
A club statement says: “St Mirren Football Club is delighted to announce the signing of Scotland international Declan Gallagher on a two-year deal.
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“The 31-year-old defender joins Saints following his departure from fellow cinch Premiership side Aberdeen and becomes our sixth signing of the summer.
“Declan joins Saints with a wealth of experience having made almost 400 career appearances and the club has beaten a host of clubs from Scotland and England to secure the signing of the Scotland international.
“After beginning his youth career with Hamilton Academical and Celtic, Declan would go on to play for Clyde, Dundee and Livingston – playing a major role in the latter’s promotion to the Premiership in 2018.”
Gallagher signed for Motherwell in 2019 and his impressive form for the Fir Park side saw him earn the first of his eight caps for the Scotland national team before moving on to Aberdeen in 2021.
He went on to make 23 appearances for the Dons during the 2021/22 season.
Meanwhile, Conor McCarthy has joined English League One side Barnsley on a three-year deal that kicks on July 1.
McCarthy, 24, spent two-and-a-half season’s at the club after arriving from Cork City, putting in 84 appearances.
But he left Stephen Robinson’s side at the end of the season after 84 appearances.
Barnsley chief executive Khaled El-Ahmad believes he is the type of player needed for a return to the Championship.
He said: “We are happy to welcome Conor, who is a versatile defender with a strong character and leadership qualities as we add additional quality to our defensive unit.”
The player took to Twitter to say: “Long, long overdue but I would like to sincerely thank everyone @saintmirrenfc for making my time at the club so enjoyable.
“What a great club to be apart of and I have made memories & friends to last a lifetime. I wish the club nothing but success in the future.”
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