The highly-rated Bianconeri defender signed an extended deal that will keep him at the club until 2020 to ward off interest from other clubs, including Scudetto rivals Napoli
After being co-owned by Empoli and Juve, the defender's rights were bought out by the reigning champions early last year, although he spent the remainder of 2014/15 on loan back at Empoli.
Rugani went on to play every minute of last season's Serie A campaign without getting booked, and his initial deal was set to expire in June 2019.
Although he has made just two league starts for Juve in 2015-16, the club's high opinion of the 21-year-old prompted them to extend his deal by a further year.
Prior to that, Napoli had attempted to capitalise on the player's reported discord to make a move for the talent and reunite him with Maurizio Sarri, his coach at Empoli.