Ryan Baird and Harry Byrne will make their first Heineken Champions Cup starts for Leinster in Saturday's clash with Northampton at the RDS Arena.
Head coach Leo Cullen names an unchanged back three, with last week's tryscorers Jimmy O'Brien and Dave Kearney selected at full-back and on the left wing, while Hugo Keenan is retained on the right.
Robbie Henshaw is again named in the centre but moves to the number 12 jersey, with Garry Ringrose back from a jaw injury to take his place at outside centre.
It's a new half-back pairing, with Jamison Gibson-Park starting at scrum-half and Byrne starting a Champions Cup game for the first time having made his debut off the bench last weekend.
It's also a new front row combination, with Ireland internationals Cian Healy, Rónan Kelleher and Andrew Porter starting.
Baird also starts a European game for the first time and is joined by James Ryan in the second row, while the back row is unchanged, with Rhys Ruddock captaining the side from blindside after his Heineken Star of the Match performance against Montpellier. Josh van der Flier is named at openside and Caelan Doris at number eight.
Leinster: Jimmy O'Brien, Hugo Keenan, Garry Ringrose, Robbie Henshaw, Dave Kearney; Harry Byrne, Jamison Gibson-Park: Cian Healy, Rónan Kelleher, Andrew Porter, Ryan Baird, James Ryan, Rhys Ruddock (captain), Josh van der Flier, Caelan Doris.
Replacements: James Tracy, Peter Dooley, Michael Bent, Ross Molony, Josh Murphy, Luke McGrath, Ross Byrne, Dan Leavy.
The Ulster team to take on Gloucester on Saturday afternoon shows just one change from the side beaten 29-22 by Toulouse last week.
Billy Burns is named captain as he returns to Kingsholm Stadium to face his former side.
Burns is the only change to the Ulster backline, as Ian Madigan drops to the bench, with John Cooney his partner at scrum-half.
Michael Lowry, Jacob Stockdale and Matt Faddes all retain their positions in the back three. Stuart McCloskey and James Hume are the starting midfield duo.
The front row remains unchanged for this game. Rob Herring is named at hooker, with Eric O'Sullivan and Marty Moore packing down at loosehead and tighthead prop.
Alan O’Connor will partner with his brother David - who will make his first Heineken Champions Cup start – in the second row. Sean Reidy has been selected at blindside, with Jordi Murphy returning at openside. Nick Timoney comes in to start at number eight.
Ulster: Michael Lowry, Matt Faddes, James Hume, Stuart McCloskey, Jacob Stockdale; Billy Burns (captain), John Cooney; Eric O'Sullivan, Rob Herring, Marty Moore, Alan O’Connor, David O’Connor, Sean Reidy, Jordi Murphy, Nick Timoney.
Replacements: John Andrew, Kyle McCall, Tom O'Toole, Matty Rea, Greg Jones, Alby Mathewson, Ian Madigan, Ethan McIlroy.
Follow the weekend's Champions Cup action with our live blogs on RTÉ Sport Online and the RTÉ News app, and listen to live commentary on Leinster v Northampton (Saturday) and Connacht v Bristol (Sunday) on RTÉ Radio 1
