Henshaw signs for Leinster
Former Munster lock Ian Nagle who played on 29 occasions for his home Province has also re-joined the team. The Province have also been further boosted after 17 players have signed new IRFU contracts with the province for 2016/17 and beyond.
"We are delighted to have secured Robbie's signature for the next three seasons. Robbie is a huge talent and we have all seen that over the last few weeks and months with Ireland in the 6 Nations and during the World Cup.
"We look forward to welcoming him into Leinster when this season is over and I am sure that our supporters would echo that view.
Henshaw also gave his thoughts and while keen to see out the season with Connacht, looked forward to the challenges ahead.
"I would like to thank Connacht Rugby, the IRFU and Leinster for allowing me time to consider my future. This has been a long and difficult process and while I am sorry to be leaving Connacht I look forward to the next chapter of my rugby career at Leinster.
"The support I have enjoyed from the fans in the Sportsground and throughout the province is something that I really value and I want to thank them for four great years.”
Cullen also spoke about the recruitment process to date and the players confirmed for next season.
"By and large we are very happy with where we are at. 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."
Renewals: Michael Bent, Adam Byrne, Tom Daly, Peter Dooley, Tadhg Furlong, Dave Kearney, Cathal Marsh, Mike McCarthy, Jack McGrath, Ross Molony, Isa Nacewa, Sean O'Brien, Garry Ringrose, Mike Ross, Rhys Ruddock, James Tracy, Josh van der Flier.
