Chelsea have appointed Porto boss Andre Villas-Boas as their new manager, a club statement announced on Wednesday.
The 33-year-old, who emerged as the front runner for the job after resigning as Porto coach on Tuesday, has signed a three year deal, making him the youngest ever Premier League manager.
Chelsea, confirming the news, described Villas-Boas who led Porto to a domestic double and Europa League glory last season, as "the outstanding candidate for the job".
They added: "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."