Defenders Tam Scobbie and Brian Easton have both signed new deals with St Johnstone which will see them stay at McDiarmid Park until the end of the 2014/2015 season.
Scobbie left hometown club Falkirk in July 2012 after coming through the Bairns' underage system and has made 44 appearances for Saints.
Easton, also 25, moved to Perth from Dundee in the summer and has made 16 appearances for the club to date.
Manager Tommy Wright said: "It's great to have them tied up on extended deals.
"Both have been very influential for us and, coming on the heels of Gary McDonald and Scott Brown renewing their contracts recently, it is good news. We will be working hard to tie up others in the weeks ahead."