The 21-year-old becomes the third Iberian member of Pep Guardiola's squad along with midfield duo Javi Martinez and Thiago Alcantara.
Committed to success
"I'm really happy that I'm going to be able to play for this club in future," he said. "Bayern are one of the biggest clubs in Europe and the world and I'm really, really pleased to be able to play in a team alongside the likes of [Philipp] , [Manuel] , [Bastian] , [Arjen] and [Franck] , and to have Pep Guardiola as coach. I'll give everything I have for the club to be successful."
The left-footed defender has risen through the ranks for his national team, representing them at Under-17, Under-19 and now Under-21 level, while he has already appeared 51 times in the Spanish Primera Division. He was also part of Spain's successful UEFA Under-19 European Championship-winning side in 2012.
One for the future
"Juan Bernat's an extraordinary young player who we've been monitoring for a while," said Bayern's sporting director Matthias Sammer. "He's quick, strong in the tackle and has an extremely good eye for goal. We're sure that, in signing Juan Bernat, we're making a very sound investment in our team for the future. We'd like to extend a warm, FC Bayern welcome to him."
Bernat passed a medical in the Bavarian capital on Monday, although he will return to Spain on Tuesday night to bid farewell to his former club and team-mates. He is due back in Munich again on Thursday to settle in to his new surroundings and commence pre-season training.