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"I am made up to be staying at United. In August I will have been at the club for 10 years and during that time I have played with some fantastic players and won everything that I hoped I would when I first signed.
I now have the chance as one of the club's senior players to help the younger players coming through and to be a part of another great United team."The fans have always been a huge part of this club and the support they have given me since my debut against Fenerbahce has been amazing.
"I am very grateful to all United fans around the world for their continued support.
"I am really excited to be a part of the club's future and want to thank David Moyes and Ed Woodward for their belief and support.
"I am convinced this is the start of another successful chapter in Manchester United's history."
Manchester United also said Rooney will also become a club ambassador.
David Moyes said "Wayne has been the best player in England since I put him into the Everton first team in 2003. Since becoming United manager, I've enjoyed working with him and seeing how he has developed his incredible talent
Manchester United have confirmed Wayne Rooney has signed a new four year deal.
The player has said he is 'made up' with the contract extension that will keep him at the club until 2019.
He signed from Everton in 2004 and has played more than four hundred matches and scored 208 goals.
Rooney has been in contract negotiations with United for some time now and Press Association Sport understands considerable progress has been made in the last few days.
It is understood that Rooney agreed the outline of a five-and-a-half year contract worth #300,000 earlier this week.
But if any formal signing or announcement was imminent on Friday, Moyes was giving little away.
In fact, the United boss was far from happy to talk about the matter on Friday afternoon.
After repeated questioning about Rooney, Moyes said: "I'd only be repeating myself again (if I answered) your question."
Moyes was determined to focus on Saturday's Barclays Premier League game against Crystal Palace, rather than talk in depth about Rooney.
Palace looked destined for relegation towards the end of 2013, but manager Tony Pulis has turned things around at the London club.
Moyes has been impressed with what the former Stoke boss has done at Selhurst Park.
"A lot of people were writing Tony off during his time at Stoke City but he hasn't half gone in there and made a few people eat their words," Moyes added.
"Results are what matter and you have to think about where Crystal Palace were and where they are now. What matters to Tony is results and he's very good at getting them."
Manchester United Manager remains tight lipped about rumours of Rooney signing a record breaking five-and-a-half year contract.
Manchester United striker Wayne Rooney has agreed a new five-and-a-half year deal with the Premier League champions.
Updates and details coming soon.