Bath are to sign Northampton Saints' Kahn Fotuali'i, head coach Mike Ford has revealed to BBC Radio Bristol.
The Samoa scrum-half, 33, has been with Northampton since joining from the Ospreys in 2013 and was part of their Premiership title-winning side in 2014.
Ford said that the signing of Fotuali'i will add experience to his side.
"That's the experience that we need."
Bath finished the Premiership season in ninth place following a 38-27 win over Leicester on Saturday in their final game.
Fotuali'i told BBC Radio Northampton: "I've enjoyed my time here. I'm sad to be leaving a big club.
"I've got another big challenge in front of me and I'm pretty excited about it."
Last week it was confirmed that South African scrum-half Nic Groom will join Northampton from Super Rugby side Stormers ahead of next season.