Saracens have announced the signing of England international Calum Clark for the beginning of next season.
The 27-year-old will move from Northampton Saints to the double champions and has signed a three-year contract with Mark McCall's team.
This will be Saracens third signing ahead of the 2017-18 season after already acquiring the services of Wales international Liam Williams and Toulouse hooker Christopher Tolofua.
Clark, whose lone international appearance has come in 2015 against France is delighted to join Saracens but insisted that his present focus is to end the season on a high with Northampton Saints.
"I am very fortunate to have played for a great club like Northampton. I've had a difficult 18 months on and off the field and I feel like I need a new challenge," said Clark.
"As ever, I am fully committed to playing to the best of my ability for the remainder of my time at the club.
"I feel very privileged to have been given an opportunity at Saracens. They are always a difficult side to play against and I'm looking forward to taking on a new environment and getting a fresh start in the summer."
Meanwhile, Saracens rugby director McCall believes the addition of Clark, Williams and Tolofua will further strengthen the side.
"Calum is a very talented player and will fit in brilliantly here. He is still a player with a huge amount of potential and in our opinion he has his best years ahead of him.
"We're looking forward to welcoming him to the club later this year. We're very happy to secure Calum's signature, along with Liam's and Christopher's, as we continue to build for the future.
"We have identified a handful of players who we felt would improve what is now a stable, successful and developing squad and we're delighted to have been able to wrap up these signings for next season."
Having played for Leeds Carnegie for four years, Clark switched to Northampton Saints in 2010 and has made over 100 appearances for the club.