Tomas O'Leary has agreed terms on a move from Munster to London Irish this summer.
O'Leary is expected to fill the void left by England international Paul Hodgson, who is joining Worcester at the end of the current campaign.
The 28-year-old Ireland international has admitted that the lure of the Aviva Premiership proved too strong.
"Joining London Irish presents a new and exciting chapter in my career and one that I am really looking forward to," he told the club's official website. "I have thoroughly enjoyed my time at Munster and the Heineken Cup triumph in 2008 will always remain a highlight.
"I'm looking forward to working alongside Brian [Smith] and the coaching team and testing myself in the Aviva Premiership and playing alongside a very talented squad at London Irish.
"I have been lucky enough to be part of some winning teams at both Munster and Ireland and I hope to have even more success as a London Irish player."
O'Leary has signed a three-year contract with the Exiles.
