Rowan Osborne has agreed a one-year deal to join Munster from Leinster.
The scrum-half made his professional debut for Leinster in 2019 and went on to make ten appearances for the Blues during their 2020-21 Guinness PRO14 campaign.
He will make the switch to Munster ahead of the 2021-22 season.
"I am delighted to be joining Munster next season, one of the biggest clubs in Europe with a great fanbase and history," Osborne commented.
"I am hugely looking forward to working with and learning from a really talented group of players and a great coaching ticket and working hard to help bring success to the club."