Robbie Henshaw has extended his IRFU contract until the summer of 2025.
The Leinster centre has agreed a three-year deal, which will bring his stay at the province to nine years.
Henshaw (28) has made 57 appearances for Ireland, winning two Six Nations titles and appearing at the 2015 and 2019 World Cups.
Prior to moving east, the Athlone native won the PRO12 title with Connacht in 2016.
At Leinster, he has been part of four league-winning sides, and also pocketed a Champions Cup medal in 2018.
He also featured for the Lions in all three tests in South Africa last summer.
"I’m delighted to have signed a contract extension with Ireland and Leinster Rugby," Henshaw said.
"We are lucky to have such high quality centres in Ireland and it is a really competitive position which makes it very exciting.
"There is so much to look forward to over the coming months and I want to play a role in achieving success for both teams."
The IRFU's Performance Director, David Nucifora, welcomed confirmation of Henshaw's deal.
"In 2021 Robbie showed that he was one of the best players in world rugby with dominant performances for both Ireland and the British and Irish Lions.
"The early part of this season was disrupted with a couple of injuries but he is a player who contributes massively to both Leinster and Ireland and he will play a big role in delivering the ambitions of both squads this season and in the years to come."
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