- 52 updates
Tomorrow's Manchester Evening News front page has the headline, "your time has come" and suggests that Everton manager David Moyes looks set to succeed Sir Alex Ferguson as Manchester United manager.
Manchester United and England midfielder Tom Cleverley has tweeted:
Andy Murray, the world number three in tennis, has tweeted:
Chancellor George Osborne said he remembers the time he canvassed Sir Alex Ferguson's house as a young candidate - Fergie is a lifelong Labour supporter.
Rio Ferdinand has become the first current Manchester United player to react to the news of Sir Alex Ferguson's retirement.
The Prime Minister has paid tribute to Sir Alex Ferguson - and suggested he could now help to make "life a little easier" for Aston Villa.
The Manchester United manager announced earlier today he is retiring, after 26 years in charge. David Cameron, who is a Villa fan, said Ferguson's contribution to football has been exceptional.
Twitter said the news of Sir Alex's retirement received more than 1.4 million mentions in the first hour after the story broke at 9.18am.
It compares with one million mentions in the four hours after the death of Lady Thatcher was first announced last month.
The original tweet from Manchester United was retweeted or made a favourite tweet more than 18,000 times, while the official club hashtag #ThankYouSirAlex had more than 100,000 mentions within the hour.
Former Manchester United midfielder David Beckham has posted the following tribute to Sir Alex Ferguson on his Facebook page.
Barcelona's Gerard Pique, Fiorentina's Giuseppe Rossi and Portland Timbers' Mikael Silvestre - all former Manchester United players - have paid tribute to Sir Alex Ferguson on Twitter:
Chief executive of Sainsbury's and lifelong Manchester United fan Justin King said he believes Sir Alex Ferguson has given the club "27 good years" and stated his belief that staff would continue his success in the future.
Latest ITV News reports
Sir Alex Ferguson's brisk way with words has influenced the way we talk about football.
A timeline of the life of outgoing Manchester United manager Sir Alex Ferguson.