Watford have completed the signing of Younes Kaboul from Sunderland, with the defender having only spent one season at the Stadium of Light.
The 30-year-old Frenchman made 23 appearances as the Black Cats battled successfully to avoid relegation last season.
Kaboul said on Watford's website: "I'm very happy and delighted to be a part of Watford Football Club, and I'm looking forward to the season.
"Just from outside, I can see it's a family club, there are some good players here and I'm very confident. The club had a very good season last year, and we need to carry that on to be even better."
Sunderland manager David Moyes was reluctant to let the former Tottenham player leave but did not want to stand in the player's way as Kaboul wanted to move closer to his family.
Moyes said: "We got an enquiry from Watford and when we did, Younes also came and saw me and said if this was right, he would like to go back to Watford.
"He wanted to go back – his family home is there and his choice would be to go back – so reluctantly, we agreed to it."