كتب : وكالات
The 26-year-old will join on a one-year loan that could be permanent next season for €7.5million.
"I am truly happy and now that I have put pen to paper, I am ready to face this World Cup adventure with enormous extra momentum," said Pepe.
"I have had two dreams come true this month: playing in a World Cup and reaching a top club.
"Juventus are the most prestigious side in Italy, their history speaks volumes. Now we must write new pages."