The French international left Old Trafford in the summer following the expiry of his contract.
Pogba has now signed a reported four-year deal with Juventus, worth in the region of £6.8million per year.
The 29-year-old spent the last six seasons with Manchester United, where he scored 39 goals in 226 games across all competitions.
During his second-spell with the Red Devils, the Frenchman helped the team to a Europa League title and the League Cup, both in 2017.
Pogba had joined United from Juventus back in 2016 for a then world record £89million transfer.
In his four seasons with the Old Lady between 2012 and 2016, the midfielder won four Serie A titles as well as four domestic cups.
The two parties will link-up once more after Pogba and United failed to agree on a new contract in the summer.
A statement from Juventus said: "When we say goodbye after an intense adventure shared together, there is always a glimmer of hope that we will see each other again, sooner or later.
"With Paul that is exactly what has happened. In 2016 our paths parted after four incredible years.
"Years in which a talented young French player went from making his First Team debut when still a teenager to scoring his first goal less than a month after making his bow.
"Years in which we learned to hold our breath in anticipation every time we saw him take aim from outside the box, because we knew how it could, and often did, end - with a roar of joy."