08/05/2013 08:33 BST | Updated 08/05/2013 08:37 BST

Sir Alex Ferguson Retires: Cristiano Ronaldo And Football Legends Pay Tribute

Cristiano Ronaldo paid tribute to his former Manchester United manager Sir Alex Ferguson, who announced his retirement today.

Ronaldo said on Twitter, "Thanks for everything, boss." and accompanied the tweet with a picture of him and Ferguson on the day he signed for United in August 2003.

Manchester City captain Vincent Kompany, former United player Ravel Morrison and a slew of politicians, including the prime minister and Labour leader Ed Miliband, also extolled the Scot.