Leinster head coach Leo Cullen has made a number of changes to the team that faced the Dragons last weekend, with 10 Irish internationals back in the mix for their Champions Cup clash away to Northampton on Friday at 7.45pm.
Robbie Henshaw returns having being sidelined with a concussion in Ireland duty against New Zealand and partners Garry Ringrose in the centre for the first time since the Round 2 game against Montpellier.
In the half backs it's as you were from last weekend with Irish internationals Luke McGrath and Joey Carbery continuing in the nine and ten jerseys. Jonny Sexton remains out with the hamstring injury suffered in the first November against All Blacks.
Rob Kearney starts at full back with Isa Nacewa captaining the side from the left wing and Adam Byrne on the right wing. The Kildare makes his Champions Cup debut having scored five tries so far this season in the Pro12.
It's a new front row with Jack McGrath, Sean Cronin and Tadhg Furlong starting.
In the second row, Meath native Devin Toner will win his 50th European cap when he runs out against the Saints. Toner made his European debut in October 2008 against Edinburgh Rugby. He will have Hayden Triggs for company in the engine room.
Finally in the back row, Sean O'Brien also returns from injury at blind side with Josh van der Flier selected at open side and Jamie Heaslip at number eight.
Leinster Academy backs Ross Byrne and Rory O'Loughlin have been selected on the bench and should they be introduced they will make their European debuts.
Leinster XV: Rob Kearney, Adam Byrne, Garry Ringrose, Robbie Henshaw, Isa Nacewa, Joey Carbery, Luke McGrath, Jack McGrath, Sean Cronin, Tadhg Furlong, Devin Toner, Hayden Triggs, Sean O'Brien, Josh van der Flier, Jamie Heaslip.
Replacements: James Tracy, Cian Healy, Michael Bent, Rhys Ruddock, Jack Conan, Jamison Gibson-Park, Ross Byrne, Rory O'Loughlin.
