St Johnstone have signed Dundee winger Gavin Swankie and Morton midfielder Chris Millar on two-year contracts.
And midfielder Paul Sheerin and striker Steven Dorris have agreed new one-year contracts with the Perth outfit.
The 24-year-old Swankie had established himself as a first-team regular in his second spell at Dens Park after returning from Arbroath in 2006.
Millar, 25, had signed a pre-contract agreement in December but on Saturday helped Morton escape relegation.
He had been at Cappielow since arriving from Celtic in 2003.
As well as continuing as a player at McDiarmid Park, 33-yearold Sheerin will be involved in coaching St Johnstone's Under-17 side.
Meanwhile, midfielder Steven Kerr has signed a six-month contract.
But youth players Adam Monaghan, Darren Wilcox, Gordon O'Brien and Johnathon Fairbairn are being allowed to leave the club.
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