Leinster head coach Leo Cullen has handed 21-year-old Offaly born prop Michael Milne his first start as the defending champions take on Ospreys at the Liberty Stadium tomorrow.
Milne, from Birr, is still in the Leinster academy, has been named on the bench 11 times since making his debut away to Benetton in September 2019. He packs down tomorrow with James Tracy and Michael Bent.
Elsewhere, second row Ross Molony makes his 100th appearance for the province with number eight Rhys Ruddock captaining the team for the third successive time. Josh Murphy and Scott Penny form the back row trio with Ruddock.
In the backs there are no changes from the side which won in Glasgow last Monday. The back three still comprises of Jimmy O'Brien - scorer of the opening try in Scotstoun - at full back, with Cian Kelleher and Dave Kearney on either wing.
Luke McGrath and Harry Byrne once more form the half back partnership.
Leinster, who are seeking a fourth successive Guinness Pro 14 title, can make it five from five with victory in Swansea against an Ospreys side who have won two and lost two from the opening four games.