Villas-Boas, succeeds Carlo Ancelotti. It can be recalled that Ancelloti, after a trophy-less season in 201-11 was fired from his position as the manager of Chelsea.
There were reports speculating Andre Villas-Boas as the new manager for Chelsea and the football club, bought him out from his FC Porto contract.
In a statement on its website, the football club informed, "Chelsea Football Club is delighted to announce that Andre Villas-Boas will be the club's new manager. He has signed a three-year contract and will start work immediately."
The statement added, "Andre was the outstanding candidate for the job. He is one of the most talented young managers in football today and has already achieved much in a relatively short space of time. His ambition, drive and determination matches that of Chelsea and we are confident Andre's leadership of the team will result in greater successes in major domestic and European competitions."
It further read, "Andre will bring his coaching experience back to a club he is already very familiar with, having previously worked here for three years. He has always been highly regarded at Chelsea and everyone here looks forward to welcoming him back and working with him."