After being passed fit to play, Johnny Sexton will captain Leinster, while Michael Lowry comes in for the injured Jacob Stockdale on the Ulster team for Friday's top-of-Conference A clash in the Pro14 at the RDS.
Sexton went off injured against Connacht last weekend for a Head Injury Assessment, but the player has completed the return-to-play protocols and is fit to start.
Hugo Keenan is selected at full-back with Jordan Larmour back after a shoulder injury to start on the right wing and Dave Kearney selected on the left.
Robbie Henshaw starts in the inside centre jersey with Ross Byrne starting outside him in the number 13 jersey for the first time in his Leinster senior career.
In the half-backs, Jamison Gibson-Park is joined by captain Sexton.
Cian Healy starts at loosehead prop with Andrew Porter at tighthead, while Seán Cronin makes his first start of the season at hooker after recovering from a thumb injury.
Former Australian international Scott Fardy is joined by James Ryan in the second row while, in the back row, fit-again Rhys Ruddock starts with Josh van der Flier at openside and Caelan Doris at number eight.
On the bench, Harry Byrne returns from a back injury picked up in the warm-up before the Northampton Saints game.
The Ulster team sees a total of six changes to the side that defeated Munster at Kingspan Stadium last Saturday.
Michael Lowry comes in to start at full-back in place of the injured Jacob Stockdale and is joined on the wings by Matt Faddes and last weekend's player-of-the-match, Ethan McIlroy. Stuart McCloskey and James Hume will form the midfield duo, and in the half-backs, John Cooney will partner Billy Burns.
Andrew Warwick and Marty Moore are named at loosehead and tighthead prop, with Rob Herring completing the front row at hooker. Alan O’Connor comes in to pair with captain Sam Carter in the second row. Greg Jones, Jordi Murphy and Marcell Coetzee make up the starting back row forwards.
John Andrew, Eric O’Sullivan, Tom O’Toole, Kieran Treadwell and Nick Timoney will provide forward reinforcements off the bench. David Shanahan, Ian Madigan and Ben Moxham will offer back line cover.
Leinster: Hugo Keenan; Jordan Larmour, Ross Byrne,Robbie Henshaw, Dave Kearney, Johnny Sexton (capt), Jamison Gibson-Park; Cian Healy, Seán Cronin, Andrew Porter, Scott Fardy, James Ryan, Rhys Ruddock, Josh van der Flier, Caelan Doris.
Replacements: James Tracy, Ed Byrne, Michael Bent, Ross Molony, Jack Conan, Luke McGrath, Harry Byrne, Jimmy O'Brien.
Ulster: Michael Lowry, Matt Faddes, James Hume, Stuart McCloskey, Ethan McIlroy, Billy Burns, John Cooney; Andrew Warwick, Rob Herring, Marty Moore, Alan O'Connor, Sam Carter (capt), Greg Jones, Jordi Murphy, Marcell Coetzee.
Replacements: John Andrew, Eric O’Sullivan, Tom O’Toole, Kieran Treadwell, Nick Timoney, David Shanahan, Ian Madigan, Ben Moxham.
Follow Leinster v Ulster (7.35pm Friday) and Connacht v Munster (7.35pm Saturday) via our live blogs on RTÉ.ie/sport and the RTÉ News app or listen to live commentary on RTÉ Radio 1 Extra and RTÉ Radio 1.
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