Nyron Nosworthy has completed a permanent move to Watford after undisclosed terms were agreed with Sunderland following his impressive loan.
Sky Sports revealed earlier on Tuesday a deal was imminent and it has now been announced the defender has signed a two-and-a-half year contract at Vicarage Road.
Nosworthy had played 13 consecutive matches during his previous loan move to Sean Dyche's Watford, and Sunderland, now managed by Martin O'Neill, were happy to allow his departure.
"It feels like home here," Nosworthy told Watford's official website.
"Credit to the manager here for the chance he gave me to play - and for helping make this deal happen."
He added: "I'm also grateful to Sunderland for letting me get on with playing first-team football, which is what I need at this stage in my career.
"It's a very professional set-up at Watford. Training is enjoyable and the whole club has impressed me."
Nosworthy left Sunderland on loan during the reign of Steve Bruce and Dyche is grateful for the assistance of the former Stadium of Light boss and his predecessor, O'Neill.
Watford manager Dyche said: "I think this an outstanding piece of business for our club, considering everything remains within the financial constraints we have here.
"Steve Bruce and Martin O'Neill have both been tremendously helpful towards this club, and that's something we should all recognise while we reflect on this great development for our squad."See all our latest markets