After cutting his teeth with the Man City reserves, Vieira has spent the past two-and-a-bit seasons manning the fort at New York City FC over in MLS, where he has overseen a marked improvement in fortunes.
"Though I have been fortunate enough to visit NY on numerous occasions, I am looking forward to living and coaching in this special city and meeting the fans as soon as possible".
"Vieira departs after two and a half years at the helm having led the team to two consecutive play-off appearances and with a current second place standing in the Eastern Conference".
Nice President Jean-Pierre Rivere said the team was looking for a coach with the "ability to continue to produce attractive football, to bring through youngsters by taking risks to help them grow, and someone who lives and breathes to win".
But as a coach he has only been part of the City Football Group - which owns both the Manchester and NY clubs.
"Patrick has been a fantastic role model at NYCFC and a true leader on and off the field".
"Though I have enjoyed a wonderful 11 years working alongside my colleague and close friend Pep Guardiola - it has always been my ambition to manage a team again and I really couldn't have hoped for a better opportunity than at this football club", said Torrent.
It was an honor to play for you and your staff (Christian Lattanzio, Kristian Wilson & Matthew Cook). His contract runs until the end of the 2020 season.
Torrent was born in Girona and played as a midfielder at provincial sides UE Olot and AD Guixols before moving into coaching at Palafrugell CF, Palamos CF and Girona FC. "I'm very happy to be here". He also won 107 caps for France, winning the World Cup in 1998 and European Championship two years later.