Suncroft's and Leinster out-half Sam Prendergast and Naas RFC's Andrew Osborne both start.
Ireland under-20 head coach Richie Murphy has made four changes to his team for Thursday's World Rugby Championship clash with Australia.
James Nicholson, Ronan Foxe, Charlie Irvine and Brian Gleeson all come into the team.
Centre Hugh Cooney misses out, having been red carded in the draw with England on Saturday.
Suncroft's and Leinster out-half Sam Prendergast and Naas RFC's Andrew Osborne are included in the starting team.
Scrum-half Jack Oliver is in line to win his first under-20s cap if introduced off the bench in South Africa.
The Ireland U20s Match Day Squad to face Australia this Thursday! 💪#FutureIsGreen | @PwCIreland
— Irish Rugby (@IrishRugby) June 27, 2023
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