McGinn recently made a special squad for a training camp at Stirling University, but this is the first time he's ever made it into the proper under-21 squad, so he'll obviously make his debut if he plays in either game.
His Saints form has dipped a bit in recent months, but he fully deserves his place in the squad and is just the latest in a long line of Saints players to get the call. Marc McAusland joined Stephen at the training camp, but his current injury problems have prevented any possible call up.
The under-21s face Albania away from home on March 28 before facing them at the Falkirk Stadium on April 1.
Story source: The Official St. Mirren Website