Ireland internationals Dave Kearney and Jack McGrath are among those committing their futures to the province
Leinster have secured the services of Munster second row Ian Nagle as well as announcing the contract extensions of 17 players.
Captain Isa Nacewa, Dave Kearney, Mike Ross, Jack McGrath, Mike McCarthy, Rhys Ruddock, Tadhg Furlong and Michael Bent are among the renewals.
Leo Cullen was quick to confirm the extensions of Irish internationals and also welcomed Nagle, who featured 29 times for Munster.
"It is well documented at this stage that Ian took a sabbatical from rugby at the end of the 2013/14 season to pursue educational opportunities most recently at Cambridge University. He has however made a return to rugby with London Irish and was involved last weekend in their win against Worcester.
"He is also relatively young at 27 and I think he will add even more experience and competition to an already competitive second row roster.”
Garry Ringrose, Josh van der Flier, Peter Dooley, James Tracy, Ross Molony, Cathal Marsh, Tom Daly and Adam Byrne have all also penned new deals.
"By and large we are very happy with where we are at" Cullen continued.
"It is fantastic to see so many talented players commit their futures to Leinster Rugby and I think the supporters will be hugely excited as we continue to build our squad for the 2016/17 season and beyond.”
Josh van der Flier