Scrum-half Nick McCarthy has rejoined Leinster ahead of next season after spending two years with Munster.
The 26-year-old Leinster Academy graduate scored four tries in 36 appearances for Leinster before moving south in 2019.
His last Leinster appearance came in the PRO14 final against Glasgow Warriors that year.
Announcing McCarthy's return, Leinster head coach Leo Cullen said: “Nick is a player we know very well.
“We know the qualities that he brings as a player, but also as a person and the additional experience he now has from two years in another environment is an added advantage.
“We look forward to him joining us for pre-season and welcoming him back to UCD.”
McCarthy added: “I want to thank everyone for my time in Munster Rugby. It’s a special club to play for with a great rugby culture.
"I have really enjoyed the experience, learned loads and made friends for life.
“I am excited now to get back to Dublin in the summer. I will continue to challenge myself, compete at the highest level and hopefully add value to the squad in Leinster.”