England loosehead prop Alex Corbisiero will join Northampton Saints next season on a three-year deal from London Irish.
Current first teamers Alex Waller and Tom Mercey have also both put pen to paper on new contracts to stay at Franklin's Gardens.
Corbisiero, who arrives from London Irish, is regarded as one of the top young props in England. Still just 24 years old, he has racked up 76 first team appearances for the Exiles and 18 England test caps, including in the successful 2011 Six Nations campaign.
Corbisiero - who has played at every age group for his country - was included in England's Six Nations Elite Player Squad last week and the New York-born loosehead says that he is excited by the prospect of joining the Saints.
"I've really enjoyed my time at London Irish and am grateful for everything that the club has given me," said Corbisiero.
"I'm looking forward to what will be a new challenge at Saints next summer. There is a great culture and hopefully I can help the team succeed whilst continuing my progression as a player, and I'm sure that Franklin's Gardens will be a good environment for me in that regard."