Tadhg Furlong has signed a two-year contract extension with Ireland and Leinster until the end of the 2026-27 season.
The 32-year-old, whose Ireland debut was against Wales in 2015, has made 78 Test appearances and has won the Six Nations title three times.
Furlong played for the British and Irish Lions Test side in 2017 and 2021 and has won four Pro12/Pro14 titles and the European Champions Cup with Leinster.
The extension means Furlong will be contracted to the Irish RFU until the summer when Ireland will start to prepare for the next 2027 World Cup, when he will be 35.
"To get the chance to continue my playing career in Ireland with my home province is a dream come true," said Furlong.
"I am delighted to extend my long association with both Leinster Rugby and the IRFU for the seasons to come.
"Since the beginning of my career I have aimed to contribute positively in a winning environment and I believe that there are bright times to come for club and country."
Furlong made his senior Leinster debut in November 2013 and has played 149 times for the province.
"Tadhg is a world-class tighthead whose influence transcends his abilities on the field," said IRFU performance director David Humphreys.
"Since breaking into the Leinster and Ireland set-ups he has set a new standard as a prop and his hunger to improve and perform at a consistently high level sets him apart."