Peter O'Mahony and Tadhg Beirne both return among four changes for Munster, ahead of the province's BKT United Rugby Championship meeting with the Stormers on Saturday.
The pair come straight into the starting team for their first appearances since the Rugby World Cup, while Conor Murray is included among the replacements.
O'Mahony comes in to captain the side at blindside flanker to replace Alex Kendellen, where he joins John Hodnett and Gavin Coombes in the back row.
Beirne takes the place of Fineen Wycherley in the second row, with academy prospect Edwin Edogbo included for the fifth time this season.
Diarmuid Barron misses out after suffering a concussion in last week's defeat to Ulster, so Scott Buckley gets the start at hooker where he is joined by John Ryan and Jeremy Loughman in the front row.
The half-back partnership of Craig Casey and Jack Crowley is retained, as is the centre pairing of Alex Nankivell and Antoine Frisch.
The only change to the backline sees academy wing Shay McCarthy take the place of Sean O'Brien, with Calvin Nash and Shane Daly completing the starting side.
Stephen Archer also named among a 6:2 split on the replacements' bench. The tighthead prop is set to make his 268th appearance for Munster, which will equal Donncha O'Callaghan's provincial record.
Munster: Shane Daly; Calvin Nash, Antoine Frisch, Alex Nankivell, Shay McCarthy; Jack Crowley, Craig Casey; Jeremy Loughman, Scott Buckley, John Ryan; Edwin Edogbo, Tadhg Beirne; Peter O'Mahony (capt), John Hodnett, Gavin Coombes.
Replacements: Chris Moore, Josh Wycherley, Stephen Archer, Tom Ahern, Jack O’Donoghue, Conor Murray, Rory Scannell, Alex Kendellen.
Leinster welcome back eight of their Irish World Cup squad to their starting line-up for tomorrow's visit of the Scarlets to the RDS.
Hugo Keenan, Garry Ringrose, Jamison Gibson-Park, Andrew Porter, Rónan Kelleher, James Ryan, Josh van der Flier and Caelan Doris all start, while Tadhg Furlong will also return off the bench.
Keenan comes in at full-back, with Jimmy O'Brien and Jordan Larmour named on the wings by head coach Leo Cullen.
Ringrose comes into the centre for his first game as co-captain as Charlie Ngatai drops out and Jamie Osborne steps moves inside to 12.
Sam Prendergast is handed a first start of the season at out-half, with the experience of Gibson-Park inside him.
In the pack, Thomas Clarkson is retained at tighthead after his try against the Dragons last week, while Porter and Kelleher come in to join him.
Co-captain Ryan starts at second row alongside Joe McCarthy, while Max Deegan joins Doris and Van der Flier in an all-new second row.
Furlong, Dan Sheehan, Ross Molony, Ross Byrne and Ciarán Frawley are among a string bench, while scrum-half Fintan Gunne is set to make his debut in the 21 shirt.
Leinster: Hugo Keenan; Jordan Larmour, Garry Ringrose (co-capt), Jamie Osborne, Jimmy O'Brien; Sam Prendergast, Jamison Gibson-Park; Andrew Porter, Rónan Kelleher, Thomas Clarkson; Joe McCarthy, James Ryan; Max Deegan, Josh van der Flier, Caelan Doris.
Replacements: Dan Sheehan, Jack Boyle, Tadhg Furlong, Ross Molony, Scott Penny, Fintan Gunne, Ross Byrne, Ciarán Frawley
Connacht have made eight changes for Saturday's meeting with the Sharks (live on RTÉ2 and RTÉ Player), as Finlay Bealham (above) returns from his World Cup break to start in the front row.
Bealham comes in at tighthead prop for the first match of Connacht's two-game tour of South Africa, while Conor Oliver captains the side for the first time.
Tadhg McElroy keeps his place at hooker, while Denis Buckley returns at loosehead having sat out the defeat to Edinburgh last week.
There's a new second row partnership of Joe Joyce and Oisin Dowling, replacing Niall and Darragh Murray, the latter of whom is on the bench.
Oliver continues in an unchanged back row and captains the side in the absence of Jack Carty, with Cian Prendergast and Sean O'Brien completing the pack.
Carty misses out entirely, with a new half-back pairing of JJ Hanrahan and Colm Reilly set to start in Durban.
Cathal Forde and Tom Farrell return in the centre, after the pair were rested for last week's game in Edinburgh, while Byron Ralston moves back to the wing where he's joined in the back three by Tiernan O'Halloran and Andrew Smith.
Among the replacements, hooker Dave Heffernan is set for his first appearance of the season, after missing the province's first four games due to injury.
Connacht: Tiernan O'Halloran; Byron Ralston, Tom Farrell, Cathal Forde, Andrew Smith; JJ Hanrahan, Colm Reilly; Denis Buckley, Tadhg McElroy, Finlay Bealham; Oisin Dowling, Joe Joyce; Cian Prendergast, Conor Oliver (capt), Sean O'Brien.
Replacements: Dave Heffernan, Peter Dooley, Dominic Robertson-McCoy, Darragh Murray, Shamus Hurley-Langton, Caolin Blade, David Hawkshaw, John Porch.
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