The new deal will keep Giggs at Old Trafford until the summer of 2014. At that time it will be just a few months before Giggs’ 40th birthday.
United boss Sir Alex Ferguson said: “Ryan is a marvellous player. In many ways, he epitomises all my teams here at United; he has constantly reinvented himself, adapted to the changing nature of the game and retained that desire and hunger for success.
“In every training session and match, he is the example for others to follow.
“The young players in the dressing room have a great chance to learn from a player who will continue to break records that anyone in the game will find hard to beat.”
“When I signed my first contract, I never thought I’d be able to play at United for 22 years but I feel good and I know I can still contribute to keeping the team pushing for honours,” Giggs said.
“Winning the club’s 19th title was a great feeling but this club is all about what we do next and I’m really pleased I can be part of that.”