Munster have confirmed the signing of Irish trio JJ Hanrahan, Chris Farrell and James Hart for next season.
Fly-half Hanrahan will return to home province Munster after two years with Northampton Saints, while Grenoble centre Farrell and Racing 92 scrum-half Hart will further boost the Thomond Park province's resources.
Dave Kilcoyne has signed a three-year contract extension, while brothers Niall and Rory Scannell, Tyler Bleyendaal, Duncan Williams and Darren Sweetnam have all agreed new terms until 2019.
"I've always indicated our intention to recruit Irish qualified players where and when possible so to secure the young trio of Farrell, Hanrahan and Hart is great for the province and Irish rugby in general," said Munster's rugby director Rassie Erasmus.
"In addition to being hugely talented they bring a wealth of knowledge with their combined experiences from playing abroad and this will help with our overall squad development."
Hanrahan left Munster in 2015 to chase regular first-team action with Northampton but will return to compete with the likes of Bleyendaal for the province's number 10 shirt.
Ireland Under-20s graduate Farrell has made 70 appearances for Grenoble in three seasons, while half-back Hart has earned 12 bows at Racing 92 this term.
New Zealand Under-20s cap Bleyendaal spent the early part of his Munster career battling a serious neck injury but has now hit prime form in Limerick.
The 26-year-old will qualify for Ireland on residency in early 2018, with Munster viewing his retention as another important boost.
"Retaining players such as Killer (Dave Kilcoyne), Niall, Rory, Tyler, Duncan and Sweets (Darren Sweetnam) is key to our long-term plans and they have all played an integral role in our success so far this season," said Erasmus.
"Developing home-grown players is at the core of everything we do and it's rewarding to see five players who have advanced from the Munster pathway commit their future to the club, while also recognising the efforts of Tyler who has overcome long-term injury to make his mark in the squad this season."
Munster also confirmed that former Ireland scrum-half Tomas O'Leary would not return to the province after joining Montpellier on a short-term loan in October.