Leinster have suffered an injury blow before their Heineken Cup clash with Northampton with the news that Sean O'Brien has failed a fitness test.
O'Brien has not recovered from a 'dead leg', meaning Shane Jennings starts while Kevin McLaughlin comes onto the bench.
Meanwhile, the visitors have also made a late change with outside centre Dom Waldouck withdrawing.
George North moves to 13 as a result while Tom Collins comes in on the wing. Tom Stephenson is added the bench.
Leinster (revised): 15 Rob Kearney, 14 Dave Kearney, 13 Brian O'Driscoll, 12 Gordon D'Arcy, 11 Luke Fitzgerald, 10 Ian Madigan, 9 Eoin Reddan, 8 Jamie Heaslip (c), 7 Shane Jennings, 6 Rhys Ruddock, 5 Mike McCarthy, 4 Devin Toner, 3 Mike Ross, 2 Sean Cronin, 1 Jack McGrath.
Replacements: 16 Aaron Dundon, 17 Michael Bent, 18 Martin Moore, 19 Leo Cullen, 20 Kevin McLaughlin, 21 John Cooney, 22 Jimmy Gopperth, 23 Zane Kirchner.
Northampton Saints (revised): 15 Ken Pisi, 14 Jamie Elliott, 13 George North, 12 Luther Burrell, 11 Tom Collins, 10 Stephen Myler, 9 Lee Diickson, 8 Samu Manoa, 7 Tom Wood, 6 Calum Clark, 5 Christian Day, 4 Courtney Lawes, 3 Salesi Ma'afu, 2 Dylan Hartley (capt), 1 Alex Waller.
Replacements: 16 Mike Haywood, 17 Ethan Waller, 18 Tom Mercey, 19 Sam Dickinson, 20 Phil Dowson, 21 Kahn Fotuali'i, 22 Glenn Dickson, 23 Tom Stephenson.
Date: Saturday 14th December
Venue: Aviva Stadium
Kick-off: 18:00 (local & GMT)
Referee: Jerome Garces (France)
Assistant referees: Sebastien Cloute, Thomas Charabas (both France)
TMO: Eric Gauzins (France)