Lindelof, who has won 12 caps for Sweden, becomes United’s most expensive defender, overtaking the £29.1m paid for Rio Ferdinand in 2002.
“I’m thrilled,” said Lindelof, who joins on a four-year contract with an option for a fifth year.
“I have enjoyed my time at Benfica enormously and I have learned a lot there,” he said. “But I’m looking forward to playing in the Premier League at Old Trafford and for Jose Mourinho.
“I’m keen to get started and make my contribution to the team’s efforts to win more trophies.”
Mourinho said: “Victor is a very talented young player, who has a great future ahead of him at United.
“Our season last year showed us that we need options and quality to add depth to the squad and Victor is the first to join us this summer.”
上个赛季，菲尔·琼斯（Phil Jones）和马科斯·罗霍（Marcos Rojo）表现出色，以至于穆里尼奥推迟了拟议的一月份林德洛夫的举动。
Both picked up injuries, though, as did Chris Smalling. Daley Blind was excellent in last month’s Europa League final but he does not have the stature Mourinho demands from his central defenders.
Lindelof身高6英尺2英寸。 而且，他在22岁时比里奥·费迪南德（Rio Ferdinand）从利兹（Leeds）转到老特拉福德（Old Trafford）时仅年轻一岁。
If Lindelof can get close to showing the poise that Ferdinand brought to Ferguson’s team, Mourinho will have got himself an outstanding foil for one of last season’s new arrivals, Eric Bailly.
The word is Mourinho is still looking at another central-defensive option, which won’t be Michael Keane, who wants regular football if he leaves Burnley.