The former Red Devils star has made it clear that any talk of 70-year old Ferguson retiring form management after this season is nonsense as the Scottish tactician still has plenty to give.
Charlton admits that the club did not think Ferguson would be in the game as along as he has been when he was appointed over 26 years ago but is delighted with how things have panned out at Old Trafford.
"When we made the decision to go for him we didn't in our wildest dreams think that it would last as long as this," said Charlton ahead of the unveiling of Ferguson's statue at Old Trafford on Friday.
"But from the beginning he obviously made people aware of what he did and how he did it with regard to controlling players and how to work with [the club] management which is also very, very important.
"I won't see his like again, I'm certain of that.
"We're really lucky, and people are really envious of us. He was born to do this job and he's going to be with us as long as he wants. "He's just a sensational manager, I keep repeating it, [but] others must look on in envy."