The veteran defender has reversed course and will join Massimiliano Allegri's men in Italy from Manchester United.
Experienced defender Patrice Evra has completed his move to Serie A champion Juventus from Manchester United.
The 33-year-old extended his long stay at Old Trafford with a new one-year deal in May but has now performed a U-turn over his future and opted to head to Italy.
Evra has penned a two-year contract with Massimiliano Allegri's men and joins former United teammates Carlos Tevez and Paul Pogba in Turin.WORLD CUP: Beautiful people | Germany homecoming
Juve has paid a fee of 1.6 million pounds for the France international's services.
"After a great deal of thought I have decided the time is right for me to leave Manchester United," Evra said in a statement. "It is the biggest decision of my career as this club is, and will always remain, in my heart."
Evra made 379 appearances for United after joining from Monaco in January 2006.
He won five Premier League titles, the Champions League, the Club World Cup and three League Cups in a trophy-laden spell at Old Trafford.