The 29-year-old was already contracted until the end of 2013 but now looks set to end his career as a one-club man.
“Danny is a unique talent and we are very privileged to have him play his entire career at Leeds Rhinos,” said Leeds head coach Brian McDermott.
“We all have been guilty over the years of perhaps taking him for granted in terms of what he does for this team because he performs at such a high level every time he steps onto the field. However, his value to this team is never underestimated and I am delighted he has agreed a contract extension.”
McGuire has enjoyed a fruitful playing career having already collected six Super League winners rings, but says he is rearing to go in his testimonial season.
“I am really pleased to get the contract agreed and signed before the start of pre-season,” he said.
“I can now fully focus on getting myself in the best possible shape for a massive season for the Rhinos and myself, with it being my testimonial year.
“I am feeling great at present, having had some time off at the end of the season, and I am raring to go for the start of pre-season training on Monday.
“We have got a massive year with the World Club Challenge against Melbourne at Headingley Carnegie first up and we all know that we need a big pre-season to get ready for that challenge.
“Last year’s game against Manly was one of the highlights of my career. To play the NRL Champions at our home ground was something special and I think this could be even bigger with Melbourne having people like Billy Slater and Cameron Smith in their side.”
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