Prop Jack McGrath and second row Tom Denton are named in the pack, with Jennings forming a back row partnership with Rhys Ruddock and number 8 Jordi Murphy.
There is further good news for the province with the inclusion of Ireland scrum half Eoin Reddan on an extended bench after a lengthy injury.
Reddan is joined by fellow Limerick man Sean Cronin, winger David Kearney and versatile Ireland-capped back Fergus McFadden who scored a hat-trick of tries in his last outing which was for Ireland against Canada in June.
Over 3,000 tickets have been sold for Friday's friendly against Northampton Saints in Donnybrook, which will be preceded by the Leinster Under-19s' encounter with Northampton U-19s at the ground (kick-off 4pm).
Tickets for the Leinster-Saints game are still on sale from just €5 online here and from usual outlets nationwide. Tickets will also be on sale at the gates which open at 5.30pm.
LEINSTER (v Northampton Saints): Darren Hudson; Darragh Fanning, Brendan Macken, Noel Reid, Sam Coghlan Murray; Jimmy Gopperth, Luke McGrath; Jack McGrath, Aaron Dundon, Martin Moore, Quinn Roux, Tom Denton, Rhys Ruddock, Shane Jennings (capt), Jordi Murphy.
Replacements: Sean Cronin, James Tracy, Jack O'Connell, Tadhg Furlong, Tadhg Beirne, Ben Marshall, Dominic Ryan, Dan Leavy, Leo Auva'a, Eoin Reddan, John Cooney, Cathal Marsh, Thomas Daly, Colm O'Shea, Fergus McFadden, Adam Byrne, David Kearney.