"It's fantastic, a really proud moment," said Ferguson.
"Normally people die before they see their statue, so I'm out-living death," added the 70 year old.
"I've had an incredible journey at the club and I've had so many great players, some of whom are here today.
"They should build this statue for them all, because they've been absolutely marvellous.
"From 1986 right through to today, the players have given us enormous pleasure.
"Everyone has had a part to play, from the players to the coaching staff, medical staff and, of course, the fans."
Former United players Eric Cantona, Ruud van Nistelrooy, Ole Gunnar Solskjaer, Edwin van der Sar, Peter Schmeichel, Andy Cole, Dwight Yorke, and Gary and Phil Neville, joined fans for the unveiling while David Beckham and Cristiano Ronaldo sent pre-recorded tributes.