The Denmark international, 28, signed for the Reds in January 2011 after agreeing a deal the previous month. His debut arrived soon after, in an FA Cup fourth round tie against Southampton at St Mary's.
Lindegaard has since played 13 times for United and looked sharp on each outing. A string of confident performances even helped him displace David De Gea from the number one spot in January 2012. But his status as Sir Alex's first choice was unfortunately brief; a knee injury sustained in training ended his season prematurely.
Fully fit again and, judging by his performances on the DHL Tour, in fine form, Lindegaard says he's delighted to put pen to paper on a new four-year deal.
"I'm very pleased to have signed a new contract," he said. "I'm glad and proud that the manager has shown the confidence he has in me by giving me a new deal.
"There is nowhere in the world I would rather be than right here. The competition for places is tough, as it should be in a club like this. It only makes us better as individuals and, more importantly, stronger as a team.
"It's what I have dreamt of all my life and nothing makes me more proud than wearing the Manchester United badge.”
Sir Alex acknowledged Lindegaard's development and admitted the Dane has the potential to pose him a number of selection dilemmas in the forthcoming campaign.