The 23-year-old is seen as one of the most talented players in Serie A and one of the most exciting to have come out of Argentina since Lionel Messi.
Nicknamed The Jewel, Dybala showed his devastating potential when he scored two goals in Tuesday's 3-0 win over Messi's Barcelona in their Champions League quarter-final first leg.
Dybala joined Juventus from Palermo in July 2015 and scored 23 goals in 46 matches in all competitions in his first season as he helped them win a Serie A and Italian Cup double and reach the Champions League round of 16.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
This season he has already scored 16 goals as Juventus challenge for the treble.
Raised at Argentine second tier club Instituto de Cordoba, Dybala moved to Italy in 2012 to sign for Palermo where he spent three seasons and slowly adapted to life in Serie A.
Juventus said in a statement that, following the contract extension, Palermo would be paid a performance bonus of 8 million euros ($8.51 million), divided into four instalments.
($1 = 0.9400 euros)
(Writing by Brian Homewood; Editing by Toby Davis)
